The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents? A. B. C ds DNA 3 5 5 3 5 3 5 3 5 3 5 3 5 5 3 3 5 3 5 3 Region to be amplified . (a) B - denaturation at a temperature of about 98°C separating the two DNA strands (b) A - denaturation at a temperature of about 50°C (c) C - extension in the presence of heat stable DNA polymerase (d) A - annealing with two sets of primers

The figure below shows three steps (A, B, C) of
Polymerase Chain Reaction (PCR). Select the
option giving correct identification together with
what it represents?
A.
B.
C
ds DNA 3
5
5
3
5
3 5
3
5
3
5
3
5
5
3 3
5
3
5 3
Region to be amplified
.
(a) B - denaturation at a temperature of about 98°C
separating the two DNA strands
(b) A - denaturation at a temperature of about 50°C
(c) C - extension in the presence of heat stable DNA
polymerase
(d) A - annealing with two sets of primers
by

1 Answer

Answer :

(c) C - extension in the presence of heat stable DNA
polymerase
by

Related questions

The correct order of steps in Polymerase Chain Reaction (PCR) is (a) extension, denaturation, annealing (b) annealing, extension, denaturation (c) denaturation, extension, annealing (d) denaturation, annealing, extension.

Description : The correct order of steps in Polymerase Chain Reaction (PCR) is (a) extension, denaturation, annealing (b) annealing, extension, denaturation (c) denaturation, extension, annealing (d) denaturation, annealing, extension.

Last Answer : (d) denaturation, annealing, extension.

The correct order of steps in Polymerase Chain Reaction (PCR) is (1) Extension, Denaturation, Annealing (2) Annealing, Extension, Denaturation (3) Denaturation, Extension, Annealing (4) Denaturation, Annealing, Extension

Description : The correct order of steps in Polymerase Chain Reaction (PCR) is (1) Extension, Denaturation, Annealing (2) Annealing, Extension, Denaturation (3) Denaturation, Extension, Annealing (4) Denaturation, Annealing, Extension

Last Answer : (4) Denaturation, Annealing, Extension

In addition to Taq polymerase, polymerase chain reaction requires all of the following except (A) A template DNA (B) Deoxyribonucleoside triphosphates (C) Primers (D) Primase

Description : In addition to Taq polymerase, polymerase chain reaction requires all of the following except (A) A template DNA (B) Deoxyribonucleoside triphosphates (C) Primers (D) Primase

Last Answer : Answer : D

The figure shows an axon terminal and synapse. Select the option giving correct identification of labels A-D. A C D B (a) A-Action potential, C-Neurotransmitter (b) B-Neurotransmitter, D- Receptor capsules (c) C-Receptor, D-Synaptic vesicles (d) A-Axon terminal, B- Serotonin complex

Description : The figure shows an axon terminal and synapse. Select the option giving correct identification of labels A-D. A C D B (a) A-Action potential, C-Neurotransmitter (b) B-Neurotransmitter, D- Receptor capsules (c) C-Receptor, D-Synaptic vesicles (d) A-Axon terminal, B- Serotonin complex

Last Answer : c) C-Receptor, D-Synaptic vesicles

The correct statement concerning RNA and DNA polymerases is (A) RNA polymerase use nucleoside diphosphates (B) RNA polymerase require primers and add bases at 5’ end of the growing polynucleotide chain (C) DNA polymerases can add nucleotides at both ends of the chain (D) All RNA and DNA polymerases can add nucleotides only at the 3’ end of the growing polynucleotide chain

Description : The correct statement concerning RNA and DNA polymerases is (A) RNA polymerase use nucleoside diphosphates (B) RNA polymerase require primers and add bases at 5' end of the growing polynucleotide ... and DNA polymerases can add nucleotides only at the 3' end of the growing polynucleotide chain

Last Answer : Answer : D

Steps involved in PCR (Polymerase Chain Reaction) process. -Biology

Description : Steps involved in PCR (Polymerase Chain Reaction) process. -Biology

Last Answer : Step 1 DNA isolation.Step 2 Primer design.Step 3 Enzyme selection.Step 4 Thermal cycling.Step 5 Amplicon analysis.

In addition to DNA polymerase and primers what else does a polymerase chain require?

Description : In addition to DNA polymerase and primers what else does a polymerase chain require?

Last Answer : Need answer

DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Description : DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Last Answer : Answer : C

The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for both antigen and antibody detection b. Southern, northern, and western immunoblot techniques are used to detect DNA, RNA, or proteins, respectively c. Polymerase chain reaction (PCR) is a sensitive assay used to detect small amounts of microbial DNA, thus detecting infection at its early stages d. Infectious agents currently detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)

Description : The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for ... detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)

Last Answer : Answer: a, b, c, d Although the classic detection of infection based on clinical signs of infection and bacterial culture remain the most common clinical tools, increasing ... including CMV and HIV. Furthermore, preliminary investigations into possible detection of fungal pathogens are underway

Which of the following statement is false (a). Enzymes are differentiated by electrophoresis method (b). While DNA sequencing both forward and reverse primers are used (c). Amplification is done through PCR (d). ABO blood grouping is mainly used for differentiating individuals

Description : Which of the following statement is false (a). Enzymes are differentiated by electrophoresis method (b). While DNA sequencing both forward and reverse primers are used (c). Amplification is done through PCR (d). ABO blood grouping is mainly used for differentiating individuals

Last Answer : Ans: (b). While DNA sequencing both forward and reverse primers are used 

The figure shows blood circulation in humans with labels A to D. Select the option which gives correct identification of label and functions of the part. (a) B - Capillary-Thin without muscle layer and wall two cell layers thick (b) C - Vein-Thin walled and blood flows in jerks/ spurts (c) D - Pulmonary vein-Takes oxygenated blood to heart, pO2 = 95 mmHg (d) A - Artery-Thick walled and blood flows evenly

Description : The figure shows blood circulation in humans with labels A to D. Select the option which gives correct identification of label and functions of the part. (a) B - Capillary-Thin without muscle layer and ... blood to heart, pO2 = 95 mmHg (d) A - Artery-Thick walled and blood flows evenly

Last Answer : (c) D - Pulmonary vein-Takes oxygenated blood to heart, pO2 = 95 mmHg

the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and

Description : the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and

Last Answer : the figure shows a diagrammatic view of human respiratory system with labels A, B , C ... walled vascular bag like structures for exchange of gases

The figure shows a section of human ovary. Select the option which gives the correct identification of either A  or  B with function/characteristic(a) B- Corpus luteum - Secretes progesterone (b) A- Tertiary follicle - Forms Graafian follicle (c) B- Corpus luteum - Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division

Description : The figure shows a section of human ovary. Select the option which gives the correct identification of either A  or  B with function/characteristic (a) B- Corpus luteum - Secretes progesterone (b) A- ... Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division

Last Answer : (a) B- Corpus luteum - Secretes progesterone

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. (a) C - Alveoli - Thin walled vascular bag like structures for exchange of gases. (b) D - Lower end of lungs - Diaphragm pulls it down during inspiration. (c) A - Trachea - Long tube supported by complete cartilaginous rings for conducting inspired air. (d) B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.

Description : The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. (a) C - ... air. (d) B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.

Last Answer : (a) C - Alveoli - Thin walled vascular bag like structures for exchange of gases.

The figure given below shows a small part of human lung where exchange of gases takes place. Select the option which represents labelled part (A, B, C or D) correctly identified along with its function. (a) C : Arterial capillary - Passes oxygen to tissues (b) A : Alveolar cavity - Main site of exchange of respiratory gases (c) D : Capillary wall - Exchange of O2 and CO2 takes place here (d) B : Red blood cells - Transport of CO2 mainly

Description : The figure given below shows a small part of human lung where exchange of gases takes place. Select the option which represents labelled part (A, B, C or D) correctly identified along with its function. ... Exchange of O2 and CO2 takes place here (d) B : Red blood cells - Transport of CO2 mainly

Last Answer : (b) A : Alveolar cavity - Main site of exchange of respiratory gases

Which of the following steps are catalysed by Taq polymerase in a PCR reaction?

Description : 9. . Which of the following steps are catalysed by Taq polymerase in a PCR reaction? (a) Denaturation of template DNA (b) Annealing of primers to template DNA (c) Extension of primer end on the template DNA (d) All of the above

Last Answer : (c) Extension of primer end on the template DNA

What are the requirements for PCR (Polymerase Chain Reaction)? -Biology

Description : What are the requirements for PCR (Polymerase Chain Reaction)? -Biology

Last Answer : answer:

What does polymerase chain reaction (pcr) do?

Description : What does polymerase chain reaction (pcr) do?

Last Answer : Polymerase chain reaction, or PCR, is a laboratory technique used to make multiple copies of a segment of DNA. PCR is very precise and can be used to amplify, or copy, a specific DNA target from a mixture of DNA molecules.

The enzyme used in polymerase chain reaction (PCR) is (A) Taq polymerase (B) RNA polymerase (C) Ribonuclease (D) Endonuclease

Description : The enzyme used in polymerase chain reaction (PCR) is (A) Taq polymerase (B) RNA polymerase (C) Ribonuclease (D) Endonuclease

Last Answer : Answer : D

The figure below shows the structure of a mitochondrion with its four parts labelled A, B, C and D. Select the part correctly matched with its function. D B A C (a) D (outer membrane) – gives rise to inner membrane by splitting (b) B (inner membrane) – forms infoldings called cristae (c) C (crista) – possesses single circular DNA molecule and ribosomes (d) A (matrix) – major site for respiratory chain enzyme

Description : The figure below shows the structure of a mitochondrion with its four parts labelled A, B, C and D. Select the part correctly matched with its function. D B A C (a) D (outer ... possesses single circular DNA molecule and ribosomes (d) A (matrix) - major site for respiratory chain enzyme

Last Answer : (b) B (inner membrane) – forms infoldings called cristae

Which one is a true statement regarding DNA polymerase used in PCR? (a) It is used to ligate introduced DNA in recipient cells. (b) It serves as a selectable marker. (c) It is isolated from a virus. (d) It remains active at high temperature.

Description : Which one is a true statement regarding DNA polymerase used in PCR? (a) It is used to ligate introduced DNA in recipient cells. (b) It serves as a selectable marker. (c) It is isolated from a virus. (d) It remains active at high temperature.

Last Answer : (d) It remains active at high temperature.

Which one is a true statement regarding DNA polymerase used in PCR ? (1) It remains active at hight temperature (2) It is used to ligate introduced DNA in recipient cells (3) It serves as a selectable marker (4) It is isolated from a virus

Description : Which one is a true statement regarding DNA polymerase used in PCR ? (1) It remains active at hight temperature (2) It is used to ligate introduced DNA in recipient cells (3) It serves as a selectable marker (4) It is isolated from a virus

Last Answer : (2) It is used to ligate introduced DNA in recipient cells

Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) Replication completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs

Description : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) ... completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs

Last Answer : (d) Palindromic sequence of base pairs

Lumirhodopsin is stable only at a temperature below (A) –35°C (B) –40°C (C) –45°C (D) –50°C

Description : Lumirhodopsin is stable only at a temperature below (A) –35°C (B) –40°C (C) –45°C (D) –50°C

Last Answer : Answer : D

Lumirhodopsin is stable only at temperature below (A) –10°C (B) –20°C (C) –40°C (D) –50°C

Description : Lumirhodopsin is stable only at temperature below (A) –10°C (B) –20°C (C) –40°C (D) –50°C

Last Answer : Answer : D

An important method used in the rapid identification of a pathogen is a. RNA gene sequencing b. polymerase chain reaction c. molecular taxonomy d. biochemical tests

Description : An important method used in the rapid identification of a pathogen is a. RNA gene sequencing b. polymerase chain reaction c. molecular taxonomy d. biochemical tests

Last Answer : d. biochemical tests

Match the organism with its use in biotechnology. (A) Bacillus (i) Cloning vector thuringiensis (B) Thermus (ii) Construction of first aquaticus rDNA molecule (C) Agrobacterium (iii)DNA polymerase tumefaciens (D) Salmonella (iv) Cry proteins typhimurium Select the correct option from the following. (A) (B) (C) (D) (a) (ii) (iv) (iii) (i) (b) (iv) (iii) (i) (ii) (c) (iii) (ii) (iv) (i) (d) (iii) (iv) (i) (ii)

Description : Match the organism with its use in biotechnology. (A) Bacillus (i) Cloning vector thuringiensis (B) Thermus (ii) Construction of first aquaticus rDNA molecule (C) Agrobacterium (iii)DNA polymerase tumefaciens (D) Salmonella (iv) Cry proteins ... (ii) (c) (iii) (ii) (iv) (i) (d) (iii) (iv) (i) (ii)

Last Answer : (b) (iv) (iii) (i) (ii)

The DNA polymerase enzyme used in PCR is obtained from

Description : 8. The DNA polymerase enzyme used in PCR is obtained from (a) Thermus aquaticus (b) Escherichia coli (c) Agrobacterium tumefaciens (d) Salmonella typhimurium.

Last Answer : (a) Thermus aquaticus

The DNA polymerase enzyme used in PCR is obtained from

Description : 6. The DNA polymerase enzyme used in PCR is obtained from (a) Thermusaquaticus (b) Escherichia coli (c) Agrobacterium tumefaciens (d) Salmonella typhimurium

Last Answer : (c) Agrobacterium tumefaciens

During DNA replication, the strands separate by (a) DNA polymerase (b) topoisomerase (c) unwindase/helicase (d) gyrase.

Description : During DNA replication, the strands separate by (a) DNA polymerase (b) topoisomerase (c) unwindase/helicase (d) gyrase.

Last Answer : b) topoisomerase

An important step in protein synthesis is transcription. Which of the following statement(s) is/are true concerning this process? a. The first step in gene transcription involves separating the double helix of DNA by an enzyme known as DNA polymerase b. The initial product of DNA transcription is called heterogeneous nuclear RNA which codes directly for proteins c. After processing is complete, the mRNA is exported from the nucleus to the cytoplasm d. Only one protein can be produced from an initial mRNA strand

Description : An important step in protein synthesis is transcription. Which of the following statement(s) is/are true concerning this process? a. The first step in gene transcription involves separating the double helix ... nucleus to the cytoplasm d. Only one protein can be produced from an initial mRNA strand

Last Answer : Answer: c Transcription of a gene begins at an initiation site associated with a specific DNA sequence, termed a promoter region. After binding to DNA, the RNA polymerase opens up a short ... different proteins from the same gene. mRNA is exported from the nucleus only after processing is complete

Match the following columns and select the correct option. Column-I Column-II (A) Bt cotton (i) Gene therapy (B) Adenosine (ii) Cellular defence deaminase deficiency (C) RNAi (iii) Detection of HIV infection (D) PCR (iv) Bacillus thuringiensis (A) (B) (C) (D) (a) (iv) (i) (ii) (iii) (b) (iii) (ii) (i) (iv) (c) (ii) (iii) (iv) (i) (d) (i) (ii) (iii) (iv)

Description : Match the following columns and select the correct option. Column-I Column-II (A) Bt cotton (i) Gene therapy (B) Adenosine (ii) Cellular defence deaminase deficiency (C) RNAi (iii) Detection of HIV infection (D) PCR (iv) Bacillus ... (i) (iv) (c) (ii) (iii) (iv) (i) (d) (i) (ii) (iii) (iv)

Last Answer : (a) (iv) (i) (ii) (iii)

Examine the given figure and select the correct option giving all the four parts (A, B, C and D) rightly identified. A B C D (a) Archego- Female Gemma Rhizoids niophore thallus cup (b) Archego- Female Bud Foot niophore thallus (c) Seta Sporo- Proto- Rhizoids phyte nema (d) Antherid- Male- Globule Roots iophore thallus

Description : Examine the given figure and select the correct option giving all the four parts (A, B, C and D) rightly identified. A B C D (a) Archego- Female Gemma Rhizoids niophore thallus cup ( ... thallus (c) Seta Sporo- Proto- Rhizoids phyte nema (d) Antherid- Male- Globule Roots iophore thallus

Last Answer : (a) Archego- Female Gemma Rhizoids niophore thallus cup

A scientist wants to make a dna fingerprint and she used polymerase chain reaction and restriction enzymes what should her next step be?

Description : A scientist wants to make a dna fingerprint and she used polymerase chain reaction and restriction enzymes what should her next step be?

Last Answer : use restriction enzymes is the right answer for apex :)

A scientist wants to make a dna fingerprint and she used polymerase chain reaction and restriction enzymes what should her next step be?

Description : A scientist wants to make a dna fingerprint and she used polymerase chain reaction and restriction enzymes what should her next step be?

Last Answer : use restriction enzymes is the right answer for apex :)

Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes

Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes

Last Answer : Answer : C

Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes

Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes

Last Answer : Answer : C

The DNA polymerase commonly used in polymerase chain reaction is obtained from (A) E. coli (B) Yeast (C) T.aquaticus (D) Eukaryotes

Description : The DNA polymerase commonly used in polymerase chain reaction is obtained from (A) E. coli (B) Yeast (C) T.aquaticus (D) Eukaryotes

Last Answer : Answer : C

Polymerase chain reaction can rapidly amplify DNA sequences of the size (A) Upto 10 kilobases (B) Upto 45 kilobases (C) Upto 100 kilobases(D) Upto 1,000 kilobases

Description : Polymerase chain reaction can rapidly amplify DNA sequences of the size (A) Upto 10 kilobases (B) Upto 45 kilobases (C) Upto 100 kilobases(D) Upto 1,000 kilobases

Last Answer : Answer : A

DNA fragments generated by the restriction endo- nucleases in a chemical reaction can be separated by (a) electrophoresis (b) restriction mapping (c) centrifugation (d) polymerase chain reaction.

Description : DNA fragments generated by the restriction endo- nucleases in a chemical reaction can be separated by (a) electrophoresis (b) restriction mapping (c) centrifugation (d) polymerase chain reaction.

Last Answer : (a) electrophoresis

Which of the following is not required for any of the techniques of DNA fingerprinting available at present? (a) Restriction enzymes (b) DNA-DNA hybridisation (c) Polymerase chain reaction (d) Zinc finger analysis

Description : Which of the following is not required for any of the techniques of DNA fingerprinting available at present? (a) Restriction enzymes (b) DNA-DNA hybridisation (c) Polymerase chain reaction (d) Zinc finger analysis

Last Answer : (d) Zinc finger analysis

Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Glycosuria (i) Accumulation of uric acid in joints B. Gout (ii) Mass of crystallised salts within the kidney C. Renal calculi (iii) Inflammation in glomeruli D. Glomerular (iv) Presence of glucose in nephritis urine A B C D (a) (iii) (ii) (iv) (i) (b) (i) (ii) (iii) (iv) (c) (ii) (iii) (i) (iv) (d) (iv) (i) (ii) (iii)

Description : Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Glycosuria (i) Accumulation of uric acid in joints B. Gout (ii) Mass of crystallised salts within the kidney ... (iii) (iv) (c) (ii) (iii) (i) (iv) (d) (iv) (i) (ii) (iii)

Last Answer : (d) (iv) (i) (ii) (iii)

Select the alternative giving correct identification and function of the organelle ‘A’ in the diagram. (a) Mitochondria - Produce cellular energy in the form of ATP (b) Golgi body - Provides packaging material (c) Lysosomes - Secrete hydrolytic enzymes (d) Endoplasmic reticulum - Synthesis of lipids

Description : Select the alternative giving correct identification and function of the organelle A' in the diagram. (a) Mitochondria - Produce cellular energy in the form of ATP (b) Golgi body - ... packaging material (c) Lysosomes - Secrete hydrolytic enzymes (d) Endoplasmic reticulum - Synthesis of lipids

Last Answer : (a) Mitochondria - Produce cellular energy in the form of ATP

Match the following RNA polymerase with their transcribed products : 1. RNA polymerase I (i) tRNA 2. RNA polymerase II (ii) rRNA 3. RNA polymerase III (iii) hnRNA Select the correct option from the following : (a) 1-i, 2-iii, 3-ii (b) 1-i, 2-ii, 3-iii (c) 1-ii, 2-iii, 3-i (d) 1-iii, 2-ii, 3-i

Description : Match the following RNA polymerase with their transcribed products : 1. RNA polymerase I (i) tRNA 2. RNA polymerase II (ii) rRNA 3. RNA polymerase III (iii) hnRNA Select the correct option from the following : (a) 1-i, 2-iii, 3-ii (b) 1-i, 2-ii, 3-iii (c) 1-ii, 2-iii, 3-i (d) 1-iii, 2-ii, 3-i

Last Answer : (b) 1-i, 2-ii, 3-iii

Match column I with column II and select the correct option using the codes given below. Column I Column II A. Pistils fused together (i) Gametogenesis B. Formation of gametes (ii) Pistillate C. Hyphae of higher (iii) Syncarpous ascomycetes D. Unisexual female (iv) Dikaryotic flower (a) A-(iv), B-(iii), C-(i), D-(ii) (b) A-(ii), B-(i), C-(iv), D-(iii) (c) A-(i), B-(ii), C-(iv), D-(iii) (d) A-(iii), B-(i), C-(iv), D-(ii)

Description : Match column I with column II and select the correct option using the codes given below. Column I Column II A. Pistils fused together (i) Gametogenesis B. Formation of gametes (ii) Pistillate C. Hyphae of higher (iii) Syncarpous ascomycetes D ... , C-(iv), D-(iii) (d) A-(iii), B-(i), C-(iv), D-(ii)

Last Answer : (d) A-(iii), B-(i), C-(iv), D-(ii)

A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them.(a) “B” is earlier pyramid and shows stabilized growth rate. (b) “B” is more recent showing that population is very young. (c) “A” is the earlier pyramid and no change has occurred in the growth rate. (d) “A” is more recent and shows slight reduction in the growth rate.

Description : A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them. ... the growth rate. (d) A is more recent and shows slight reduction in the growth rate.

Last Answer : (d) “A” is more recent and shows slight reduction in the growth rate.

Why is Taq polymerase used in PCR? -Biology

Description : Why is Taq polymerase used in PCR? -Biology

Last Answer : Taq DNA Polymerase is highly efficient, so it becomes fully functional as it reaches its optimum temperature. It also has a half-life of more than two hours (at a temperature of 92 °C), a high-amplification capacity, and the ability to add 150 nucleotides per second.

Why is Taq polymerase used in PCR? -Biology

Description : Why is Taq polymerase used in PCR? -Biology

Last Answer : Taq DNA Polymerase is highly efficient, so it becomes fully functional as it reaches its optimum temperature. It also has a half-life of more than two hours (at a temperature of 92 °C), a high-amplification capacity, and the ability to add 150 nucleotides per second.

The two strands of the DNA double helix are held together by (a) Hydrogen bonds (b)C=C double bonds (c) Hydrophobic bonds (d) Peptide bonds

Description : The two strands of the DNA double helix are held together by (a) Hydrogen bonds (b)C=C double bonds (c) Hydrophobic bonds (d) Peptide bonds

Last Answer : Ans:(a)