____________________ is a recombination event that occurs during gamete formation in eukaryotes.

Which of the following methods of DNA repair involves enzymes that recognize and correct nucleotide errors in unmethylated strands of DNA?

a. Light repair of T dimers

b. Dark repair of P dimers

c. Mismatch repair

d. SOS response

Explain the central dogma of genetics.

Which of the following is not a mechanism of genetic transfer between cells?

a. Transduction

b. Transformation

c. Transcription

d. Conjugation

__________ RNA carries amino acids.

Compare and contrast the processes of transformation, transduction, and conjugation.

Fill in the following table:

Cells that have the ability to take up DNA from their environment are said to be ___________.

a. Hfr cells

b. transposing

c. genomic

d. competent

__________ RNA and __________ RNA are antisense; that is, they are complementary to another nucleic acid molecule.

Which of the following statements is true?

a. Conjugation requires a sex pilus extending from the surface of a cell.

b. Conjugation involves a C factor.

c. Conjugation is an artificial genetic engineering technique.

d. Conjugation involves DNA that has been released into the environment.

Which of the following are called “jumping genes”?

a. Hfr cells

b. Transducing phages

c. Palindromic sequences

d. Transposons

Although two cells are totally unrelated, one cell receives DNA from the other cell and incorporates this new DNA into its chromosome. This process is ___________.

a. crossing over of DNA from the two cells

b. vertical gene transfer

c. horizontal gene transfer

d. transposition

Transcription produces:

a. DNA molecules

b. RNA molecules

c. Polypeptides

d. Palindromes

A nucleotide is made of:

a. A five-carbon sugar

b. Phosphate

c. A nitrogenous base

d. All of the above

A sequence of nucleotides formed during replication of the lagging DNA strand is a(n):

a. Palindrome

b. Okazaki fragment

c. Coding strand

d. Operon

Which of the following is not part of an operon?

a. Operator

b. Promoter

c. Origin

d. Gene

Repressible operons are important in regulating prokaryotic:

a. DNA replication

b. RNA transcription

c. rRNA processing

d. Sugar catabolism

Which of the following is part of each molecule of mRNA?

a. Palindrome

b. Codon

c. Anticodon

d. Base pair

Ligase plays a major role in:

a. Replication of lagging strands

b. mRNA processing in eukaryotes

c. Polypeptide synthesis by ribosomes

d. RNA transcription

Before mutations can affect a population permanently, they must be __________ .

a. lasting

b. inheritable

c. beneficial

d. all of the above

The trp operon is repressible. This means it is usually __________ and is directly controlled by a(n) ___________ .

a. active / inducer

b. active / repressor

c. inactive / inducer

d. inactive /repressor