Chapter 14: DNA: The Genetic Material
(178).jpg "Chapter 14: DNA: The Genetic Material")
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- 1.DNA consists of two antiparallel strands of nucleotide chains held together by
- A.
Peptide bonds.
- B.
Polar covalent bonds.
- C.
Ionic bonds.
- D.
Hydrogen bonds.
- E.
Complementary base pairing bonds.
- 2.The method of DNA replication, where each original strand is used as a template to build a new strand, is called the
- A.
Conservative method.
- B.
Semiconservative method.
- C.
Disruptive method.
- D.
Continuous method.
- E.
Replication and amplification method.
- 3.The enzyme that catalyzes the synthesis of new DNA molecules is called
- A.
DNA ligase.
- B.
DNA polymerase.
- C.
DNA gyrase.
- D.
DNA helicase.
- E.
DNA endonuclease.
- 4.Griffith worked with
- A.
Bacteriophage.
- B.
Drosophila.
- C.
Frog eggs.
- D.
Streptococcus.
- 5.When nonvirulent bacteria were mixed with dead virulent bacteria, Griffith unexpectedly found that the injected mice died. He explained this behavior by suggesting the nonvirulent strain of bacteria as being
- A.
Activated.
- B.
Transformed.
- C.
Translated.
- D.
Transcribed.
- E.
Expressed.
- 6.Avery and his coworkers showed the "transforming principle" as
- A.
Protein.
- B.
Polysaccharide.
- C.
DNA.
- D.
RNA.
- E.
Lipid.
- 7.Which of the following statements about the Hershey-Chase experiment is false?
- A.
DNA was labeled with radioactive phosphorus.
- B.
Protein was labeled with radioactive sulfur.
- C.
The virus-infected bacteria showed radioactive phosphorus.
- D.
The virus-infected bacteria contained radioactive sulfur.
- 8.Hershey-Chase concluded from their experiment with T2 bacteriophage that
- A.
Proteins are the genetic material.
- B.
Polysaccharide coat contains the genetic material.
- C.
DNA is the genetic material.
- D.
Viruses are needed for DNA to function.
- E.
DNA contains sulfur.
- 9.A bacteriophage typically attaches to the bacterium and then
- A.
Converts the bacteria into immortal cells.
- B.
Injects its nucleic acid into it, and then the ghost virus stays outside.
- C.
Falls off every time.
- D.
Viral protein is injected and the viral DNA stays outside.
- E.
It becomes inactive.
- 10.DNA primase
- A.
Creates a short RNA primer complementary to the RNA template.
- B.
Creates a short DNA primer complementary to the RNA template.
- C.
Creates a short DNA primer complementary to the DNA template.
- D.
Creates a short template of an RNA primer that is complementary to the DNA primer.
- E.
Creates a short RNA primer complementary to the DNA template.
- 11.An enzyme unwind DNA helical structure is
- A.
DNA polymerase.
- B.
DNA ligase.
- C.
Helicase.
- D.
DNA endonuclease.
- E.
DNA exonuclease.
- 12.Which of the following is not a component of nucleic acids?
- A.
Organic nitrogen bases
- B.
Sugar
- C.
Phosphate
- D.
Protein
- 13.The reading of the bases along the length of a nucleic acid molecule for either transcription or translation is done from the
- A.
1' end.
- B.
2' end.
- C.
3' end.
- D.
4' end.
- E.
5' end.
- 14.The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a
- A.
C = C bond.
- B.
Hydrogen bond.
- C.
Hydrophobic bond.
- D.
Phosphodiester bond.
- E.
Peptide bond.
- 15.Chargaff's rules for the pairing of nitrogen bases is
- A.
A = C and G = T.
- B.
A pairs with T and G pairs with C.
- C.
A pairs with G and C pairs with T.
- D.
A pairs with C and G pairs with T.
- E.
T = C and G = A.
- 16.Information obtained by Franklin from X-ray crystallography on DNA suggested that it is a
- A.
Helix.
- B.
Ribbon.
- C.
Hollow cylinder.
- D.
Pleated sheet.
- E.
Icosahedron.
- 17.The chemical bonds that stabilize the complimentary nitrogen bases into a double helix are
- A.
Nitrogen bonds.
- B.
Hydrogen bonds.
- C.
Hydrophobic bonds.
- D.
Peptide bonds.
- E.
Phosphodiester bonds.
- 18.The two strands in the DNA molecule contain nitrogen bases which are
- A.
Identical.
- B.
Parallel.
- C.
Complementary.
- D.
The same in all species.
- E.
Exact copies of the protein they make.
- 19.Replication of DNA is
- A.
Conservative.
- B.
Redundant.
- C.
Dispersive.
- D.
Semiconservative.
- E.
Semidispersive.
- 20.DNA polymerase requires a(n)
- A.
Amino acid primer.
- B.
Lipid primer.
- C.
Hydrophilic primer.
- D.
DNA primer.
- E.
RNA primer.
- 21.The lagging strand is replicated with stretches of Okazaki fragments and that is why its synthesis is considered to be
- A.
Discontinuous.
- B.
Continuous.
- C.
Primed.
- D.
Never stopping.
- E.
Semiconservative.
- 22.Replication always proceeds by adding new bases to the
- A.
1' end.
- B.
2' end.
- C.
3' end.
- D.
4' end.
- E.
5' end.
- 23.Which of the following statements about replication of DNA is false?
- A.
The two strands are separated.
- B.
Each strand is used as a template for making a new duplex.
- C.
The synthesis on each strand is in the opposite direction.
- D.
The newly synthesized DNA is packaged into one nucleus, and the old DNA is packaged into another nucleus.
- 24.The double helix model was proposed by
- A.
Watson and Crick.
- B.
Griffith.
- C.
Avery.
- D.
Franklin.
- E.
Beadle and Tatum.
- 25.Griffith, a British microbiologist, used a bacteria and mice to demonstrate transformation. His results clearly offered evidence for that process. Transformation is
- A.
The ability for bacterial homologous chromosomes to transform themselves into an exact copy, sometimes referred to as DNA replication.
- B.
The ability of the nucleus of a cell to regenerate and repair itself when damaged by bacterial infections.
- C.
The ability of the infected mice to transform the bacteria from pathogenic to non-pathogenic during the experiments.
- D.
The ability to transfer genetic materials from one cell to another.
- E.
The ability for the nucleus of a bacterial cell to bypass the process of DNA replication by transforming into a spore during unsuitable environmental conditions.
Questions: 10 | Attempts: 8343 | Last updated: Jul 13, 2021
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Sample QuestionDNA is found in the ___ of a cell.
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Sample QuestionWhat will most likely be the effect of the change in the DNA molecule ?
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Sample QuestionWhich of the following is TRUE about mutation
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