which best describes the structure of dna molecule?

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 of the following statement describes plasmids? A- Another name for a protoplast B- A complex membrane structure that covers the chromosome of bacteria Small, circular DNA molecules that can exist independently of chromosomes commonly C- found in bacteria D- None of the above

Description : Which of the following statement describes plasmids? A- Another name for a protoplast B- A complex membrane structure that covers the chromosome of bacteria Small, circular DNA molecules that can exist independently of chromosomes commonly C- found in bacteria D- None of the above

Last Answer : found in bacteria

What describes the motion of water molecule in ice?

Description : What describes the motion of water molecule in ice?

Last Answer : They do not move at all

Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds of alkynes are higher in energy than the bonds and are thus more reactive. (c) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

Description : Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds ... fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

Last Answer : Alkynes are generally more reactive than alkenes.

Which of the statements below correctly describes an achiral molecule? (a) The molecule has a nonsuperimposable mirror image. (b) The molecule exhibits optical activity when it interacts with plane-polarized light. (c) The molecule has an enantiomer. (d) The molecule might be a meso form

Description : Which of the statements below correctly describes an achiral molecule? (a) The molecule has a nonsuperimposable mirror image. (b) The molecule exhibits optical activity when it interacts with plane-polarized light. (c) The molecule has an enantiomer. (d) The molecule might be a meso form

Last Answer : The molecule might be a meso form

Which of the following statements best describes a lead compound? a) A compound that contains the element lead b) A compound from the research laboratory that is chosen to go forward for preclinical and clinical trials. c) A molecule that shows some activity or property of interest and serves as the starting point for the development of a drug. d) The first compound of a structural class of compounds to reach the market.

Description : Which of the following statements best describes a lead compound? a) A compound that contains the element lead b) A compound from the research laboratory that is chosen to go forward for preclinical and ... of a drug. d) The first compound of a structural class of compounds to reach the market.

Last Answer : c) A molecule that shows some activity or property of interest and serves as the starting point for the development of a drug.

What bases are found in a DNA molecule?

Description : What bases are found in a DNA molecule?

Last Answer : The nitrogen bases found in a DNA molecule are adenine, thymine,cytosine, and guanine.

what molecule makes DNA?

Description : what molecule makes DNA?

Last Answer : DNA stands for Deoxyribo nucleic acid . It has a deoxy riboseand a nitrogen base and the phosphate gruop as the backbone of DNA.The DNA is basically made up th nucleotide base pair which arethymine , Adenine , Guanine, and Cytosine. DNA is considered as agenetic material in humans.

What is the shape of DNA molecule ?

Description : What is the shape of DNA molecule ?

Last Answer : DNA molecules are shaped like a spiral staircase.

After 4 PCR cycles how many DNA molecules are formed from one DNA template molecule ?

Description : After 4 PCR cycles how many DNA molecules are formed from one DNA template molecule ?

Last Answer : After 4 PCR cycles how many DNA molecules are formed from one DNA template molecule ? A. 4 B. 32 C. 16 D. 8

Single circular DNA molecule is found in :-

Description : Single circular DNA molecule is found in :-

Last Answer : Single circular DNA molecule is found in :- A. B B. D C. C D. E

How many molecules of DNA would result from the molecule after five cycles of PCR?

Description : How many molecules of DNA would result from the molecule after five cycles of PCR?

Last Answer : The number of double stranded DNA pieces is doubled in each cycle, so that after n cycles you have 2^n (2 to the n:th power) copies of DNA. For example, after 10 cycles you have 1024 copies, after 20 cycles you have about one million copies, etc.

If a DNA molecule is 20 percent G what are the percentages of the other three bases?

Description : If a DNA molecule is 20 percent G what are the percentages of the other three bases?

Last Answer : What is the answer ?

What percent of the material in a DNA molecule contains the genetic code?

Description : What percent of the material in a DNA molecule contains the genetic code?

Last Answer : What is the answer ?

Where does the Replication of DNA molecule happens?

Description : Where does the Replication of DNA molecule happens?

Last Answer : Need answer

What is a section of DNA molecule that carries the genetic code for a particular trait?

Description : What is a section of DNA molecule that carries the genetic code for a particular trait?

Last Answer : Need answer

What are the smaller repeating molecules that make up a DNA or RNA molecule called?

Description : What are the smaller repeating molecules that make up a DNA or RNA molecule called?

Last Answer : Need answer

Every DNA molecule is made up of molecules called?

Description : Every DNA molecule is made up of molecules called?

Last Answer : dk

A Gene is (A) A single protein molecule (B) A group of chromosomes (C) An instruction for making a protein molecule (D) A bit of DNA molecule

Description : A Gene is (A) A single protein molecule (B) A group of chromosomes (C) An instruction for making a protein molecule (D) A bit of DNA molecule

Last Answer : Answer : D

The eukaryotic nuclear chromosomal DNA (A) Is a linear and unbranched molecule (B) Is not associated with a specific membranous organelle (C) Is not replicated semiconservatively (D) Is about of the same size as each prokaryotic chromoses

Description : The eukaryotic nuclear chromosomal DNA (A) Is a linear and unbranched molecule (B) Is not associated with a specific membranous organelle (C) Is not replicated semiconservatively (D) Is about of the same size as each prokaryotic chromoses

Last Answer : Answer : A

After termination of the synthesis of RNA molecule, the core enzymes separate from the DNA template. The core enzymes then recognize a promoter at which the synthesis of a new RNA molecule commences, with the assistance of (A) Rho (ρ) factor (B) δ factor (C) β factor (D) σ factor

Description : After termination of the synthesis of RNA molecule, the core enzymes separate from the DNA template. The core enzymes then recognize a promoter at which the synthesis of a new RNA molecule commences, with the assistance of (A) Rho (ρ) factor (B) δ factor (C) β factor (D) σ factor

Last Answer : Answer : D

Termination of the synthesis of the RNA molecule is signaled by a sequence in the template strand of the DNA molecule, a signal that is recognized by a termination protein, the (A) Rho (ρ) factor (B) σ factor (C) δ factor (D) ε factor

Description : Termination of the synthesis of the RNA molecule is signaled by a sequence in the template strand of the DNA molecule, a signal that is recognized by a termination protein, the (A) Rho (ρ) factor (B) σ factor (C) δ factor (D) ε factor

Last Answer : Answer : A

IN a DNA molecule, the guanosine content is 40%, the adenine content will be (A) 10% (B) 20% (C) 30% (D) 40%

Description : IN a DNA molecule, the guanosine content is 40%, the adenine content will be (A) 10% (B) 20% (C) 30% (D) 40%

Last Answer : Answer : A

In a DNA molecule the thymine concentration is 30%, the guanosine concentration will be (A) 10% (B) 20% (C) 30% (D) 40%

Description : In a DNA molecule the thymine concentration is 30%, the guanosine concentration will be (A) 10% (B) 20% (C) 30% (D) 40%

Last Answer : Answer : B

The number of base pair in a single turn of B-form DNA about the axis of the molecule is (A) 4 (B) 8 (C) 10 (D) 12

Description : The number of base pair in a single turn of B-form DNA about the axis of the molecule is (A) 4 (B) 8 (C) 10 (D) 12

Last Answer : Answer : C

In DNA molecule (A) Guanine content does not equal cytosine content (B) Adenine content does not equal thymine content (C) Adenine content equals uracil content (D) Guanine content equals cytosine content

Description : In DNA molecule (A) Guanine content does not equal cytosine content (B) Adenine content does not equal thymine content (C) Adenine content equals uracil content (D) Guanine content equals cytosine content

Last Answer : Answer : D

Identify the correct molecule which controls the biosynthesis of proteins in living organisms. (A) DNA (B) RNA (C) Purines (D) Pyrimidines

Description : Identify the correct molecule which controls the biosynthesis of proteins in living organisms. (A) DNA (B) RNA (C) Purines (D) Pyrimidines

Last Answer : Answer : A

The molecule which helps in decoding genetic information carried by DNA

Description : The molecule which helps in decoding genetic information carried by DNA

Last Answer : Ans. RNA

The only molecule in the living world that can replicate itself is (a) DNA (b) RNA (c) Both DNA and RNA (d) Neither DNA nor RNA

Description : The only molecule in the living world that can replicate itself is (a) DNA (b) RNA (c) Both DNA and RNA (d) Neither DNA nor RNA

Last Answer : Ans:(a)

Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Description : Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Last Answer : (1) Chlorophyll molecule Explanation: The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in ... was discovered in 1906 and was the first time that magnesium had been detected in living tissue.

Give reason: The two strands of DNA molecule are complementary to each other but are not identical.

Description : Give reason: The two strands of DNA molecule are complementary to each other but are not identical.

Last Answer : The two strands of DNA are not identical because the nitrogenous bases are different in pairing. A purine base of one polynucleotide chain always pairs with a pyramidine base on the other. Adenine (A) pairs ... and Cytosine (C) pairs with Thymine (T). Hence the two strands of DNA are complementary.

Name the nitrogenous bases in a DNA molecule.

Description : Name the nitrogenous bases in a DNA molecule.

Last Answer : The four nitrogenous bases are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).

Is a gene the same as a DNA molecule?

Description : Is a gene the same as a DNA molecule?

Last Answer : Genes are the units of heredity. A gene is a segment or section of a DNA molecule. This segment of DNA provides a genetic code for the synthesis of proteins. The nucleic acid language of the ... . This is the molecular language that will ultimately specify an amino acid sequence in a protein.

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)

Restriction endonuclease (a) synthesizes DNA (b) cuts the DNA molecule randomly (c) cuts the DNA molecule at specific sites (d) restricts the synthesis of DNA inside the nucleus.

Description : Restriction endonuclease (a) synthesizes DNA (b) cuts the DNA molecule randomly (c) cuts the DNA molecule at specific sites (d) restricts the synthesis of DNA inside the nucleus.

Last Answer : (c) cuts the DNA molecule at specific sites

Restriction endonucleases are enzymes which (a) make cuts at specific positions within the DNA molecule (b) recognize a specific nucleotide sequence for binding of DNA ligase (c) restrict the action of the enzyme DNA polymerase (d) remove nucleotides from the ends of the DNA molecule

Description : Restriction endonucleases are enzymes which (a) make cuts at specific positions within the DNA molecule (b) recognize a specific nucleotide sequence for binding of DNA ligase (c) restrict the action of the enzyme DNA polymerase (d) remove nucleotides from the ends of the DNA molecule

Last Answer : (a) make cuts at specific positions within the DNA molecule

DNA or RNA segment tagged with a radioactive molecule is called (a) vector (b) probe (c) clone (d) plasmid.

Description : DNA or RNA segment tagged with a radioactive molecule is called (a) vector (b) probe (c) clone (d) plasmid.

Last Answer : (b) probe

Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements. (i) DNA is negatively charged molecule and so it is loaded on gel towards the anode terminal. (ii) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA. (iii)Smaller the size of DNA fragment larger is the distance it travels through it. (iv) Pure DNA can be visualized directly by exposing UV radiation. Choose correct answer from the options given below. (a) (i), (iii) and (iv) (b) (i), (ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)

Description : Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements. (i) DNA is negatively charged molecule and so it is loaded on gel towards the anode terminal. (ii) DNA ... (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)

Last Answer : (d) (i), (ii) and (iv)

Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) The enzyme cuts DNA molecule at identified position within the DNA. (c) The enzyme binds DNA at specific sites and cuts only one of the two strands. (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Description : Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) ... (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Last Answer : (c) The enzyme binds DNA at specific sites and cuts only one of the two strands.

The DNA molecule to which the gene of interest is integrated for cloning is called (a) template (b) carrier (c) transformer (d) vector.

Description : The DNA molecule to which the gene of interest is integrated for cloning is called (a) template (b) carrier (c) transformer (d) vector.

Last Answer : (d) vector.

.The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon

Description : .The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon

Last Answer : (d) recognition of an anti-codon.

Escherichia coli fully labelled with 15N is allowed to grow in 14N medium. The two strands of DNA molecule of the first generation bacteria have (a) different density and do not resemble parent DNA (b) different density but resemble parent DNA (c) same density and resemble parent DNA (d) same density but do not resemble parent DNA.

Description : Escherichia coli fully labelled with 15N is allowed to grow in 14N medium. The two strands of DNA molecule of the first generation bacteria have (a) different density and do not resemble parent DNA ( ... DNA (c) same density and resemble parent DNA (d) same density but do not resemble parent DNA.

Last Answer : (c) same density and resemble parent DNA

The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon.

Description : The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon.

Last Answer : c) aminoacylation of tRNA

which best describes the structure of dna molecule?

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