Biology Chapter 5

What was the major finding of Hershey-Chase experiment?

Radioactive phosphorus and radioactive sulfur were both transferred into bacterial cells in equal amounts, proving that DNA was hereditary material.

The majority of radioactive phosphorus was transferred into bacterial cells, proving that DNA was hereditary material.

The majority of radioactive material was found in the liquid medium, proving that DNA was hereditary material.

The majority of radioactive phosphorus was found in the bacteriophage "ghosts", proving that DNA was hereditary material.

The majority of radioactive sulfur was transferred into bacterial cells, proving that DNA was hereditary material.

What are the basic components of a single nucleotide in a DNA molecule?

A phosphate group, a deoxyribose sugar, and a hydrogen

A phosphate group, a ribose sugar, and a nitrogen-containing base

A phosphate group, a deoxyribose sugar, and a pyrimidine base

A phosphate group, a deoxyribose sugar, and a purine base

A phosphate group, a deoxyribose sugar, and a nitrogen-containing base

Which of the following types of nitrogen bases are present in a DNA molecule?

Adenine, thymine, cytosine, uracil

Adenine, thymine, cytosine, guanine

Adenine, cytosine, guanine, uracil

Thymine, cytosine, guanine, uracil

Adenine, guaine, uracil, phosphate

What did Rosalind Franklins X-ray diffraction images reveal about the structure of DNA?

DNA is a polymer of nucleotides

DNA has a helical structure

DNA is composed of adenine, thymine, cytosine, and guanine

The amount of adenine is the same as thymine, and the amount of guanine equals the amount of cytosine

In a double-stranded DNA molecule, the complementary strand 5' -AAACGCTT -3' is

In prokaryotic genomes, which regions determine when certain genes and the associated cell functions are activated?

The results of the Meselson - Stahl experiment supported which model of DNA replication?

The leading strand of DNA is synthesized

In both 5' to 3' and 3' to 5' directions

Discontinuously in a 5' to 3' direction

Discontinuously in a 3' to 5' direction

Continuously in a 5' to 3' direction

Continuously in a 3' to 5' direction

How would DNA replication be affected if there were a mutation in the gene that codes for DNA ligase?

Okazaki fragments would not be joined

Errors in DNA replication would be not corrected

Unwinding of the DNA would be stalled

Elongation of the leading strand would not occur

RNA primers would not be synthesized

Which os the following statements about DNA replication in prokaryotes and eukaryotes is true?

In prokaryotes, elongation occurs in a 3' to 5' direction. In eukaryotes, elongation occurs in a 5' to 3' direction

Prokaryotes have a single origin of replication, while eukaryotes have multiple origins of replication

The rate of DNA replication in prokaryotes and eukaryotes in similar

Prokaryotes and eukaryotes both have telomeres at the ends of their linear chromosomes

Prokaryotes have continuous synthesis of both leading and lagging strands, while eukaryotes have discontinuous synthesis on both leading and lagging strands

Which are the main components of a single nucleotide?

A glucose sugar, a phosphate group, and a nitrogenous base

Two sugars, a phosphate group, and a nitrogenous base

A ribose sugar, a deoxyribose sugar, a phosphate group, and a nitrogenous base

A sugar, a phosphate group, and four nitrogenous bases

A sugar, a phosphate group, and nitrogenous base

The Meselson-Stahl experiment demonstrated that DNA replication produces two DNA molecules each composed of

Two new strands

Two old strands

One old and one new strand

Two strands with variable proportions of new and old DNA

A variable number of old and new strands

A cell is missing the gene that codes for a helicase enzyme. What affect will this have on replication?

Decreased strain on double helix

Decreased stability of single strands

Increased stability of single strands

Faster unwinding of double helix

Slower unwinding of double helix

During which phase(s) of DNA replication does an RNA primer bind to DNA?