Left handed double helix is present in (A) Z-DNA (B) A-DNA (C) B-DNA (D) None of these

Left handed double helix is present in (A) Z-DNA (B) A-DNA (C) B-DNA (D) None of these
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Ten base pairs are present in one turn of the helix in (A) A-DNA (B) B-DNA (C) C-DNA (D) Z-DNA

Description : Ten base pairs are present in one turn of the helix in (A) A-DNA (B) B-DNA (C) C-DNA (D) Z-DNA

Last Answer : Answer : B

Which is wrong about nucleic acids? (a) DNA is single stranded in some viruses. (b) RNA is double stranded occasionally. (c) Length of one helix is 45 Å in B-DNA. (d) One turn of Z-DNA has 12 bases

Description : Which is wrong about nucleic acids? (a) DNA is single stranded in some viruses. (b) RNA is double stranded occasionally. (c) Length of one helix is 45 Å in B-DNA. (d) One turn of Z-DNA has 12 bases

Last Answer : (c) Length of one helix is 45 Å in B-DNA

The structural stability of the double helix of DNA is as cribbed largely to (A) Hydrogen bonding between adjacent purine bases (B) Hydrophobic bonding between staked purine and pyrinuidine nuclei (C) Hydrogen bonding between adjacent pyrimidine bases (E) Hydrogen bonding between purine and pyrimidine bases

Description : The structural stability of the double helix of DNA is as cribbed largely to (A) Hydrogen bonding between adjacent purine bases (B) Hydrophobic bonding between staked purine and ... Hydrogen bonding between adjacent pyrimidine bases (E) Hydrogen bonding between purine and pyrimidine bases

Last Answer : Answer : D

Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Description : Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Last Answer : Answer : D

DNA topoisomerase I of E. coli catalyses (A) Relaxation of negatively supercoiled DNA (B) Relaxation of positively supercoiled DNA (C) Conversion of negatively supercoiled DNA into positively supercoiled DNA (D) Conversion of double helix into supercoiled DNA

Description : DNA topoisomerase I of E. coli catalyses (A) Relaxation of negatively supercoiled DNA (B) Relaxation of positively supercoiled DNA (C) Conversion of negatively supercoiled DNA into positively supercoiled DNA (D) Conversion of double helix into supercoiled DNA

Last Answer : Answer : A

The enzyme DNA ligase (A) Introduces superhelical twists (B) Connects the end of two DNA chains (C) Unwinds the double helix (D) Synthesises RNA primers

Description : The enzyme DNA ligase (A) Introduces superhelical twists (B) Connects the end of two DNA chains (C) Unwinds the double helix (D) Synthesises RNA primers

Last Answer : Answer : B

The width (helical diameter) of the double helix in B-form DNA in nm is (A) 1 (B) 2 (C) 3 (D) 4

Description : The width (helical diameter) of the double helix in B-form DNA in nm is (A) 1 (B) 2 (C) 3 (D) 4

Last Answer : Answer : B

Mitochondrial DNA is (A) Circular double stranded (B) Circular single stranded (C) Linear double helix (D) None of these

Description : Mitochondrial DNA is (A) Circular double stranded (B) Circular single stranded (C) Linear double helix (D) None of these

Last Answer : A

Who Discovered the Double Helix DNA ?

Last Answer : Double helix discovers DNA (Watson and Creek)

DNA Double Helix Model Discovery Does Who ?

Last Answer : Watson And Creek DNA Double Helix Model Discovery Does.

What are the components and structure of a DNA double helix molecule?

Description : What are the components and structure of a DNA double helix molecule?

Last Answer : Feel Free to Answer

The outside of the DNA double helix is made of alternating groups of deoxyribose sugars and _____.?

Description : The outside of the DNA double helix is made of alternating groups of deoxyribose sugars and _____.?

Last Answer : phosphates

The double helix model of DNA proposed by

Description : The double helix model of DNA proposed by

Last Answer : Ans. Watson and Crick (1953)

Double helix model of DNA was proposed by

Description : Double helix model of DNA was proposed by

Last Answer : Ans. Watson and Crick (1953)

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

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)

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately (a) 2.0 meters (b) 2.5 meters (c) 2.2 meters (d) 2.7 meters.

Description : If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately (a) 2.0 meters (b) 2.5 meters (c) 2.2 meters (d) 2.7 meters.

Last Answer : (b) 2.5 meters

There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are (a) DNA ligase (b) DNA topoisomerase I (c) DNA gyrase (d) DNA polymerase I.

Description : There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are (a) DNA ligase (b) DNA topoisomerase I (c) DNA gyrase (d) DNA polymerase I.

Last Answer : (c) DNA gyrase

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately (a) 2.0 meters (b) 2.5 meters (c) 2.2 meters (d) 2.7 meters.

Description : If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately (a) 2.0 meters (b) 2.5 meters (c) 2.2 meters (d) 2.7 meters.

Last Answer : (c) 2.2 meters

Radiotracer technique shows that DNA is in (a) multi-helix stage (b) single-helix stage (c) double-helix stage (d) none of these.

Description : Radiotracer technique shows that DNA is in (a) multi-helix stage (b) single-helix stage (c) double-helix stage (d) none of these.

Last Answer : (c) double-helix stage

The association of histone H1 with a nucleosome indicates that (a) DNA replication is occurring (b) the DNA is condensed into a chromatin fibre (c) the DNA double helix is exposed (d) transcription is occurring.

Description : The association of histone H1 with a nucleosome indicates that (a) DNA replication is occurring (b) the DNA is condensed into a chromatin fibre (c) the DNA double helix is exposed (d) transcription is occurring.

Last Answer : (b) the DNA is condensed into a chromatin fibre

In double helix of DNA, the two DNA strands are (a) coiled around a common axis (b) coiled around each other(c) coiled differently (d) coiled over protein sheath.

Description : In double helix of DNA, the two DNA strands are (a) coiled around a common axis (b) coiled around each other (c) coiled differently (d) coiled over protein sheath.

Last Answer : (a) coiled around a common axis

What is the genetic material in influenza virus? (a) Double helical DNA (b) RNA (c) Single helix DNA (d) None of these

Description : What is the genetic material in influenza virus? (a) Double helical DNA (b) RNA (c) Single helix DNA (d) None of these

Last Answer : (b) RNA

The double helix is a structural arrangement associated with _____. a. A Polysaccharide. b. The DNA Molecule. c. Glucose Molecules In Starch. d. A Protein.

Description : The double helix is a structural arrangement associated with _____. a. A Polysaccharide. b. The DNA Molecule. c. Glucose Molecules In Starch. d. A Protein.

Last Answer : b. The DNA Molecule.

The association of histone H1 with a nucleosome indicates: (1) DNA replication is occurring. (2) The DNA is condensed into a Chromatin Fibre. (3) The DNA double helix is exposed. (4) Transcription is occurring.

Description : The association of histone H1 with a nucleosome indicates: (1) DNA replication is occurring. (2) The DNA is condensed into a Chromatin Fibre. (3) The DNA double helix is exposed. (4) Transcription is occurring.

Last Answer : (2) The DNA is condensed into a Chromatin Fibre.

The structure of DNA is a double helix formed by two strands of DNA sequence. This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and Guanine. How do the nucleotides on one strand interact with the nucleotides on the second strand to maintain the helical shape of DNA?

Description : The structure of DNA is a double helix formed by two strands of DNA sequence. This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and Guanine. How do the nucleotides on one strand interact with the nucleotides on the second strand to maintain the helical shape of DNA?

Last Answer : Complementary Base Pairing. Adenine complementary base pairs with Thymine and Guanine complementary base pairs with Cytosine.

B-DNA is: (a) Antiparallel and right handed (b) Antiparallel and left handed (c) Parallel and right handed (d) Parallel and left handed

Description : B-DNA is: (a) Antiparallel and right handed (b) Antiparallel and left handed (c) Parallel and right handed (d) Parallel and left handed

Last Answer : Ans. ((a))

During replication, unwinding of double helix is initiated by (A) DNAA protein (B) DnaB protein (C) DNAC protein (D) Rep protein

Description : During replication, unwinding of double helix is initiated by (A) DNAA protein (B) DnaB protein (C) DNAC protein (D) Rep protein

Last Answer : Answer : B

Proteins which interact with DNA and affect the rate of transcription possess the following structural motif: (A) Helix-turn-helix motif (B) Zinc finger motif (C) Leucine zipper motif (D) All of these

Description : Proteins which interact with DNA and affect the rate of transcription possess the following structural motif: (A) Helix-turn-helix motif (B) Zinc finger motif (C) Leucine zipper motif (D) All of these

Last Answer : Answer : D

All the following statements about fibronectin are true except (A) It is glycoprotein (B) It is a triple helix (C) It is present in extra cellular matrix (D) It binds with integrin receptors of cell

Description : All the following statements about fibronectin are true except (A) It is glycoprotein (B) It is a triple helix (C) It is present in extra cellular matrix (D) It binds with integrin receptors of cell

Last Answer : Answer : A

All of the following statements about restriction endonucleases are true except: (A) They are present in bacteria (B) They act on double stranded DNA (C) They recognize palindromic sequences (D) They always produce sticky ends

Description : All of the following statements about restriction endonucleases are true except: (A) They are present in bacteria (B) They act on double stranded DNA (C) They recognize palindromic sequences (D) They always produce sticky ends

Last Answer : Answer : D

With effect from------------------, all Single/Double handed Sub Post Offices, at the time of closure/premature closure of RD/MIS/SCSS accounts will collect closed passbook from the depositor and attach the same with account closure form and send in a manner as prescribed for dispatch of vouchers and LOT to HO. a) 15.2.2008 b) 11.06.2010 c) 23.06.2010 d) None of these

Description : With effect from------------------, all Single/Double handed Sub Post Offices, at the time of closure/premature closure of RD/MIS/SCSS accounts will collect closed passbook from the depositor and attach the same with ... LOT to HO. a) 15.2.2008 b) 11.06.2010 c) 23.06.2010 d) None of these

Last Answer : a) 15.2.2008

Why are the two strands of the double helix described as being complementary?

Description : Why are the two strands of the double helix described as being complementary?

Last Answer : Complementarity is the key to understand the stability of the double helix of DNA in the Watson-Crick model (the most stable among other conformations). DNA complementarity property is determined by ... close to unity for deoxyribose nucleic acid." (In perfect agreement with the Chargaff's rules)

Why are the two strands of the double helix described as being complementary?

Description : Why are the two strands of the double helix described as being complementary?

Last Answer : Complementarity is the key to understand the stability of the double helix of DNA in the Watson-Crick model (the most stable among other conformations). DNA complementarity property is determined by ... close to unity for deoxyribose nucleic acid." (In perfect agreement with the Chargaff's rules)

How has the discovery of the double helix helped us?

Description : How has the discovery of the double helix helped us?

Last Answer : It showed how something (DNA) could code for proteins AND itself at the same time.

The helix angle for double helical gears may be made up to (A) 45° (B) 60° (C) 75° (D) 90°

Description : The helix angle for double helical gears may be made up to (A) 45° (B) 60° (C) 75° (D) 90°

Last Answer : (A) 45°

Are both sides of the DNA helix used for the same amino acid?

Description : Are both sides of the DNA helix used for the same amino acid?

Last Answer : Typically only one strand is used as the template for messenger RNA synthesis, but some regions of DNA can encode multiple RNAs that are transcribed from opposite strands.

DNA Molecule Bi - helix Of structure Father Who ?

Last Answer : DNA Molecule Bi - helix Of structure Father Watson, Creek

In DNA helix, cytosine is paired with guanine by

Description : In DNA helix, cytosine is paired with guanine by

Last Answer : In DNA helix, cytosine is paired with guanine by A. covalent bond B. phosphate bond C. three hydrogen bonds D. two hydrogen bonds

$ DNA helix to 20Å wide. One complete turn of DNA is 34Å long.

Description : $ DNA helix to 20Å wide. One complete turn of DNA is 34Å long.

Last Answer : $ DNA helix to 20Å wide. One complete turn of DNA is 34Å long. A. If both As and R are correct and R ... , R is wrong D. If both As and R are wrong.

The enzyme which catalyzes the unwinding of DNA helix during replication is: (1) Primase (2) Topoisomerase (3) Helicase (4) DNA polymerase

Description : The enzyme which catalyzes the unwinding of DNA helix during replication is: (1) Primase (2) Topoisomerase (3) Helicase (4) DNA polymerase

Last Answer : (3) Helicase Explanation: A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP ( ... The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.

Name the enzyme that facilitates opening of DNA helix during transcription. (a) DNA ligase (b) DNA helicase (c) DNA polymerase (d) RNA polymerase

Description : Name the enzyme that facilitates opening of DNA helix during transcription. (a) DNA ligase (b) DNA helicase (c) DNA polymerase (d) RNA polymerase

Last Answer : b) DNA helicase

One turn of the helix in a B-form DNA is approximately (a) 2 nm (b) 20 nm (c) 0.34 nm (d) 3.4 nm.

Description : One turn of the helix in a B-form DNA is approximately (a) 2 nm (b) 20 nm (c) 0.34 nm (d) 3.4 nm.

Last Answer : ) 3.4 nm.

The enzyme which catalyzes the unwinding of DNA helix during replication is: (1) Primase (2) Topoisomerase (3) Helicase (4) DNApolymerase

Description : The enzyme which catalyzes the unwinding of DNA helix during replication is: (1) Primase (2) Topoisomerase (3) Helicase (4) DNApolymerase

Last Answer : C option is the answer

Do left handed people feel odd shaking hands with their right?

Description : Do left handed people feel odd shaking hands with their right?

Last Answer : I’m left handed. I never noticed a problem using my right hand. ~ It is actually better for me since I can secretly have my left hand on my concealed firearm or sword in case things go awry.

Lefties, care to share your left handed experiences?

Description : Lefties, care to share your left handed experiences?

Last Answer : answer:My mom is lefty. I wouldn't call this particular thing I'm going to name a struggle, but I know she tries to sit at the end of the table where her left elbow won't hit the person ... scissors and cooks (stirs and mixes) righty, so she doesn't have some of the struggles some lefties have.

In a formal dining setting, is it gauche for a left handed person to re-arrange the silverware to better meet their needs?

Description : In a formal dining setting, is it gauche for a left handed person to re-arrange the silverware to better meet their needs?

Last Answer : answer:I don’t think it’s gauche, but I’m not left handed, and I don’t travel in the social circles where people would ever use the term “gauche”. But I do think there is some irony in your use of the word “gauche” in the first place.

If you wear a woman's size L glove and have some extra right-handed ones, how about matching them with my collection of left-handed ones?

Description : If you wear a woman's size L glove and have some extra right-handed ones, how about matching them with my collection of left-handed ones?

Last Answer : It’s a big mystery of life. Missing gloves, missing socks…there’s probably a Stephen King story about this.

Is there something special about left-handed people?

Description : Is there something special about left-handed people?

Last Answer : My son is left handed and according to him thsy are very special people,