Question 1

Watson and Crick based their conclusion that DNA is a double helix mainly on experimental results and measurements from

Accepted Answer

A) Chargaff,Wilkins,and Franklin. 
B) Avery,MacLeod,and McCarty. 
C) Hershey and Chase. 
D) Charles Darwin. 
A) Chargaff,Wilkins,and Franklin. 
B) Avery,MacLeod,and McCarty. 
C) Hershey and Chase. 
D) Charles Darwin.

Question 2

When DNA folds and winds into the nucleus of a cell,it shrinks in length by a factor of

Accepted Answer

A) 10. 
B) 100. 
C) 1,000. 
D) 7,000. 
A) 10. 
B) 100. 
C) 1,000. 
D) 7,000.

Question 3

The number of DNA replications in an average human lifetime is approximately

Accepted Answer

A) one billion. 
B) three trillion. 
C) 100 trillion. 
D) 100 quadrillion. 
A) one billion. 
B) three trillion. 
C) 100 trillion. 
D) 100 quadrillion.

Question 4

Chargaff showed that DNA that has 20% guanine has _____ cytosine.

Accepted Answer

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

Question 5

Polymerase chain reaction requires _____,a DNA polymerase from a bacterium that lives in hot springs.

Accepted Answer

A) Taql 
B) telomerase 
C) T7 DNA polymerase 
D) Pol III 
A) Taql 
B) telomerase 
C) T7 DNA polymerase 
D) Pol III

Question 6

In a eukaryotic genome,DNA replication starts at

Accepted Answer

A) a single origin of replication. 
B) one replication fork per chromosome. 
C) nucleosomes. 
D) multiple sites along the length of each chromosome. 
A) a single origin of replication. 
B) one replication fork per chromosome. 
C) nucleosomes. 
D) multiple sites along the length of each chromosome.

Question 7

Chromatin consists of about

Accepted Answer

A) 10% histones,30% DNA binding proteins,30% DNA,and 30% RNA. 
B) 25% histones,25% DNA binding proteins,25% DNA,and 25% RNA. 
C) 30% histones,30% DNA binding proteins,30% DNA,and 10% RNA. 
D) 10% histones,10% DNA binding proteins,70% DNA,and 10% RNA. 
A) 10% histones,30% DNA binding proteins,30% DNA,and 30% RNA. 
B) 25% histones,25% DNA binding proteins,25% DNA,and 25% RNA. 
C) 30% histones,30% DNA binding proteins,30% DNA,and 10% RNA. 
D) 10% histones,10% DNA binding proteins,70% DNA,and 10% RNA.

Question 8

Avery,MacLeod,and McCarty's experiments built on the results of the experiments of

Accepted Answer

A) Gregor Mendel. 
B) Frederick Griffith. 
C) Alfred Hershey and Martha Chase. 
D) Erwin Chargaff and Phoebus Levene. 
A) Gregor Mendel. 
B) Frederick Griffith. 
C) Alfred Hershey and Martha Chase. 
D) Erwin Chargaff and Phoebus Levene.

Question 9

Which base pair is complementary?

Accepted Answer

A) A and T 
B) C and T 
C) A and G 
D) C and C 
A) A and T 
B) C and T 
C) A and G 
D) C and C

Question 10

DNA is able to replicate as quickly as it does because it has many

Accepted Answer

A) replication forks. 
B) genes. 
C) chromosomes. 
D) histones. 
A) replication forks. 
B) genes. 
C) chromosomes. 
D) histones.

Question 11

_____ used X-ray diffraction to deduce the helical shape of DNA.

Accepted Answer

A) Linus Pauling 
B) James Watson and Francis Crick 
C) Martha Chase 
D) Rosalind Franklin 
A) Linus Pauling 
B) James Watson and Francis Crick 
C) Martha Chase 
D) Rosalind Franklin

Question 12

_____ incorrectly suggested that DNA has a triple helix structure.

Accepted Answer

A) Linus Pauling 
B) James Watson and Francis Crick 
C) Maclyn McCarty 
D) Rosalind Franklin 
A) Linus Pauling 
B) James Watson and Francis Crick 
C) Maclyn McCarty 
D) Rosalind Franklin

Question 13

In one minute,human DNA replicates about _____ bases.

Accepted Answer

A) 40 
B) 100 
C) 1,000 
D) 3,000 
A) 40 
B) 100 
C) 1,000 
D) 3,000

Question 14

The enzyme that inserts the correct bases in a growing nucleotide chain in a replicating DNA molecule is

Accepted Answer

A) RNA polymerase. 
B) DNA ligase. 
C) DNA polymerase. 
D) helicase. 
A) RNA polymerase. 
B) DNA ligase. 
C) DNA polymerase. 
D) helicase.

Question 15

Meselson and Stahl's experiment followed

Accepted Answer

A) the distribution of different-weighted DNA over multiple generations of bacteriA. 
B) the ability of a protease or nuclease to stop the transmission of DNA over generations. 
C) viruses injecting their DNA into bacteria. 
D) DNA sequences in people who are politically liberal compared to those who are sometimes politically conservative. 
A) the distribution of different-weighted DNA over multiple generations of bacteriA. 
B) the ability of a protease or nuclease to stop the transmission of DNA over generations. 
C) viruses injecting their DNA into bacteria. 
D) DNA sequences in people who are politically liberal compared to those who are sometimes politically conservative.

Question 16

Which chemical is not a part of DNA?

Accepted Answer

A) phosphate 
B) ribose 
C) cytosine 
D) nitrogen 
A) phosphate 
B) ribose 
C) cytosine 
D) nitrogen

Question 17

The nitrogenous bases adenine and thymine are

Accepted Answer

A) both purines. 
B) both pyrimidines. 
C) a purine and a pyrimidine,respectively. 
D) a pyrimidine and a purine,respectively. 
A) both purines. 
B) both pyrimidines. 
C) a purine and a pyrimidine,respectively. 
D) a pyrimidine and a purine,respectively.

Question 18

Chargaff showed that DNA in several species contains equal amounts guanine and _____.

Accepted Answer

A) nitrogen 
B) thymine 
C) cytosine 
D) adenine 
A) nitrogen 
B) thymine 
C) cytosine 
D) adenine

Question 19

The "steps" of the DNA double helix spiral staircase are

Accepted Answer

A) sugars. 
B) hydrogen bonds. 
C) base pairs. 
D) nucleotides. 
A) sugars. 
B) hydrogen bonds. 
C) base pairs. 
D) nucleotides.

Question 20

A nucleotide consists of

Accepted Answer

A) three sugars for every phosphate. 
B) three phosphates for every sugar. 
C) one deoxyribose sugar,one nitrogenous base,and one phosphate group. 
D) three DNA bases. 
A) three sugars for every phosphate. 
B) three phosphates for every sugar. 
C) one deoxyribose sugar,one nitrogenous base,and one phosphate group. 
D) three DNA bases.

Exam 9: DNA Structure and Replication

Watson and Crick based their conclusion that DNA is a double helix mainly on experimental results and measurements from

When DNA folds and winds into the nucleus of a cell,it shrinks in length by a factor of

The number of DNA replications in an average human lifetime is approximately

Chargaff showed that DNA that has 20% guanine has _____ cytosine.

Polymerase chain reaction requires _____,a DNA polymerase from a bacterium that lives in hot springs.

In a eukaryotic genome,DNA replication starts at

Chromatin consists of about

Avery,MacLeod,and McCarty's experiments built on the results of the experiments of

Which base pair is complementary?

DNA is able to replicate as quickly as it does because it has many

_____ used X-ray diffraction to deduce the helical shape of DNA.

_____ incorrectly suggested that DNA has a triple helix structure.

In one minute,human DNA replicates about _____ bases.

The enzyme that inserts the correct bases in a growing nucleotide chain in a replicating DNA molecule is

Meselson and Stahl's experiment followed

Which chemical is not a part of DNA?

The nitrogenous bases adenine and thymine are

Chargaff showed that DNA in several species contains equal amounts guanine and _____.

The "steps" of the DNA double helix spiral staircase are

A nucleotide consists of

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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