Question 1

Miescher discovered phosphorus in DNA taken from

Accepted Answer

A) bacteriA. 
B) viruses. 
C) soiled bandages. 
D) dead mice. 
A) bacteriA. 
B) viruses. 
C) soiled bandages. 
D) dead mice. C

Question 2

Frederick Griffith was a microbiologist who observed that

Accepted Answer

A) DNA contains nitrogen and phosphorus. 
B) proteases disrupt transformation from nonvirulence to virulence. 
C) DNA from heat-killed viruses transforms virulent viruses. 
D) nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria. 
A) DNA contains nitrogen and phosphorus. 
B) proteases disrupt transformation from nonvirulence to virulence. 
C) DNA from heat-killed viruses transforms virulent viruses. 
D) nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria. D

Question 3

In a DNA molecule,the base pairs provide information,and the sugar-phosphate backbone does not,because

Accepted Answer

A) the base pairs are all the same,but the sugar-phosphate backbone varies. 
B) there are eight types of base pairs. 
C) the bases form a sequence,and the sugar-phosphate backbone does not. 
D) the sugar-phosphate backbone is highly unstable. 
A) the base pairs are all the same,but the sugar-phosphate backbone varies. 
B) there are eight types of base pairs. 
C) the bases form a sequence,and the sugar-phosphate backbone does not. 
D) the sugar-phosphate backbone is highly unstable. C

Question 4

Which of the following statements is true in DNA replication?

Accepted Answer

A) DNA polymerase unwinds the DNA at replication forks. 
B) Primase removes short RNA primers and replaces them with DNA. 
C) Ligase breaks the hydrogen bonds between complementary DNA strands. 
D) DNA polymerase proofreads DNA,correcting mismatched nucleotides. 
A) DNA polymerase unwinds the DNA at replication forks. 
B) Primase removes short RNA primers and replaces them with DNA. 
C) Ligase breaks the hydrogen bonds between complementary DNA strands. 
D) DNA polymerase proofreads DNA,correcting mismatched nucleotides.

Question 5

When DNA replication halts in a polymerase chain reaction,owing to the incorporation of a tagged base into a growing DNA chain,a(n)_____ results.

Accepted Answer

A) partial DNA molecule 
B) template strand 
C) complementary sequence 
D) first-generation DNA molecule 
A) partial DNA molecule 
B) template strand 
C) complementary sequence 
D) first-generation DNA molecule

Question 6

Next-generation sequencing reads millions of sequences at once,and so the general approach is also called "massively parallel DNA sequencing."

Accepted Answer

A) True 
 B)False

Question 7

In a molecule of DNA,purine bases form _____ bonds with pyrimidine bases.

Accepted Answer

A) phosphate 
B) hydrogen 
C) disulfide 
D) covalent 
A) phosphate 
B) hydrogen 
C) disulfide 
D) covalent

Question 8

Purines and pyrimidines refer to the _____ of the DNA molecules.

Accepted Answer

A) nitrogenous bases 
B) sugar-phosphate backbone 
C) hydrogen bonds 
D) nucleus 
E) histones 
A) nitrogenous bases 
B) sugar-phosphate backbone 
C) hydrogen bonds 
D) nucleus 
E) histones

Question 9

Erwin Chargaff showed that DNA that has 30% adenine has _____ thymine.

Accepted Answer

A) 20% 
B) 30% 
C) 60% 
D) 40% 
A) 20% 
B) 30% 
C) 60% 
D) 40%

Question 10

Hydrogen bonds are not as strong as ionic or covalent bonds,but they are able to hold the DNA double helix together because

Accepted Answer

A) there are so many of them. 
B) the hydrogen bonds in DNA differ from hydrogen bonds in other molecules. 
C) the hydrogen bonds in DNA also have a very special type of molecular glue. 
D) ten of them form between each DNA base pair. 
A) there are so many of them. 
B) the hydrogen bonds in DNA differ from hydrogen bonds in other molecules. 
C) the hydrogen bonds in DNA also have a very special type of molecular glue. 
D) ten of them form between each DNA base pair.

Question 11

Which of the following were part of the experiments of Hershey and Chase?

Accepted Answer

A) Mice were injected with type R bacteria and developed pneumoniA. 
B) Mice were injected with type S bacteria and developed pneumonia. 
C) DNA isolated from type S bacteria killed by heating transformed type R bacteria. 
D) E.coli bacteria were infected with virus labeled with radioactive phosphorus. 
A) Mice were injected with type R bacteria and developed pneumoniA. 
B) Mice were injected with type S bacteria and developed pneumonia. 
C) DNA isolated from type S bacteria killed by heating transformed type R bacteria. 
D) E.coli bacteria were infected with virus labeled with radioactive phosphorus.

Question 12

A gene is 13,066 nucleotides long.This is

Accepted Answer

A) about 1.3 microbases. 
B) about 1.3 kilobases. 
C) about 1.3 megabases. 
D) about 3,011 amino acids. 
A) about 1.3 microbases. 
B) about 1.3 kilobases. 
C) about 1.3 megabases. 
D) about 3,011 amino acids.

Question 13

Okazaki fragments are small pieces of

Accepted Answer

A) RNA. 
B) protein. 
C) DNA. 
D) enzymes. 
A) RNA. 
B) protein. 
C) DNA. 
D) enzymes.

Question 14

_____ used models to deduce the double helical shape of DNA.

Accepted Answer

A) Linus Pauling 
B) James Watson and Francis Crick 
C) Martha Chase 
D) Maclyn McCarty 
A) Linus Pauling 
B) James Watson and Francis Crick 
C) Martha Chase 
D) Maclyn McCarty

Question 15

DNA entwined around an octet of proteins is called a(n)

Accepted Answer

A) nucleotide. 
B) karyosome. 
C) nucleosome. 
D) ribosome. 
A) nucleotide. 
B) karyosome. 
C) nucleosome. 
D) ribosome.

Question 16

DNA in the nucleus winds around proteins called

Accepted Answer

A) histones. 
B) karyosomes. 
C) ribosomes. 
D) proteasomes. 
A) histones. 
B) karyosomes. 
C) ribosomes. 
D) proteasomes.

Question 17

Meselson and Stahl distinguished between parental and newly-synthesized DNA by using

Accepted Answer

A) heavy metal. 
B) heavy and light forms of nitrogen. 
C) nucleic acid dyes. 
D) chromosome paints. 
A) heavy metal. 
B) heavy and light forms of nitrogen. 
C) nucleic acid dyes. 
D) chromosome paints.

Question 18

_____ first noted an acidic substance in the nuclei of cells from pus.

Accepted Answer

A) Mendel 
B) Watson 
C) Miescher 
D) McCarty 
A) Mendel 
B) Watson 
C) Miescher 
D) McCarty

Question 19

Meselson and Stahl's experiments showed that DNA replication is

Accepted Answer

A) dispersive,conservative,and semi-conservative. 
B) dispersive,but not conservative or semi-conservative. 
C) semi-conservative,but not dispersive or conservative. 
D) quasi-conservative,but not dispersive or semi-conservative. 
A) dispersive,conservative,and semi-conservative. 
B) dispersive,but not conservative or semi-conservative. 
C) semi-conservative,but not dispersive or conservative. 
D) quasi-conservative,but not dispersive or semi-conservative.

Question 20

In DNA replication,

Accepted Answer

A) parental DNA shatters into pieces and joins with newly-synthesized pieces to fashion two double helices from one. 
B) parental DNA remains intact but guides formation of new double helices. 
C) the parental DNA splits and free nucleotides bond to their complements,building two DNA molecules from one. 
D) an entirely new double helix is built using information in the sequence of amino acids. 
A) parental DNA shatters into pieces and joins with newly-synthesized pieces to fashion two double helices from one. 
B) parental DNA remains intact but guides formation of new double helices. 
C) the parental DNA splits and free nucleotides bond to their complements,building two DNA molecules from one. 
D) an entirely new double helix is built using information in the sequence of amino acids.

Exam 9: DNA Structure and Replication

Miescher discovered phosphorus in DNA taken from

Frederick Griffith was a microbiologist who observed that

In a DNA molecule,the base pairs provide information,and the sugar-phosphate backbone does not,because

Which of the following statements is true in DNA replication?

When DNA replication halts in a polymerase chain reaction,owing to the incorporation of a tagged base into a growing DNA chain,a(n)_____ results.

Next-generation sequencing reads millions of sequences at once,and so the general approach is also called "massively parallel DNA sequencing."

In a molecule of DNA,purine bases form _____ bonds with pyrimidine bases.

Purines and pyrimidines refer to the _____ of the DNA molecules.

Erwin Chargaff showed that DNA that has 30% adenine has _____ thymine.

Hydrogen bonds are not as strong as ionic or covalent bonds,but they are able to hold the DNA double helix together because

Which of the following were part of the experiments of Hershey and Chase?

A gene is 13,066 nucleotides long.This is

Okazaki fragments are small pieces of

_____ used models to deduce the double helical shape of DNA.

DNA entwined around an octet of proteins is called a(n)

DNA in the nucleus winds around proteins called

Meselson and Stahl distinguished between parental and newly-synthesized DNA by using

_____ first noted an acidic substance in the nuclei of cells from pus.

Meselson and Stahl's experiments showed that DNA replication is

In DNA replication,

What Is in a Human Genome

Cells

Meiosis,Development and Aging

Single-Gene Inheritance

Beyond Mendels Laws

Matters of Sex

Multifactorial Traits

Genetics of Behavior

Gene Action: From DNA to Protein

Gene Expression and Epigenetics

Gene Mutation

Chromosomes

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry and Evolution

Genetics of Immunity

Cancer Genetics and Genomics

Genetic Technologies: Patenting, modifying, and Monitoring Dna

Genetic Testing and Treatment

Reproductive Technologies

Genomics

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