Which one of the following statements about RNA processing is true?

A. RNA splicing can be catalyzed by tRNA,

B. Introns are cut out before mRNA leaves the nucleus,

C. RNA polymerase removes exons from the pre-mRNA,

D. A pre-mRNA is often much shorter than the final mRNA molecule, that leaves the nucleus.

Which reproductive strategy results in greater genetic variation among the offspring?

List some mechanisms that increase genetic variation among human offspring.

Which of the following statements about the genetic code is not true?

a. The genetic code is almost universal.

b. The genetic code is a doublet code.

c. Multiple codons may encode the same amino acid.

d. Some special codons mean "stop."

Before a cell can proceed to mitosis from the G2 stage of the cell cycle, it must:

A) double in size.

B) complete a full cell cycle.

C) undergo cytokinesis.

D) duplicate its DNA.

The energy released from glucose by the process of cellular respiration is in the form of ______.

a. ATP only

b. ATP and heat

c. ATP and NADH

d. heat only

e. oxygen only

What are the current known methods of delivering genes to cells for gene therapy?

A silent mutation is more likely to occur as a result of the following:

A. point mutation alters the amino acid encoded within the gene.

B. point mutation that does not change the amino acid encoded within the gene.

C. a hefty dose of radiation.

D. the movement of a transposon into an exon.

E. frameshift mutation.

Mutations are 'relatively uncommon because:

a. DNA repair enzymes often repair errors.

b. frameshift mutations occur very frequently.

c. transposons are constantly moving throughout the genome.

d. physical mutations such as X-rays seldom damage DNA.

e. DNA can repair itself over time.

In what way do transposons cause mutations to occur? (Multiple Choice)

a) Transposons move within and between chromosomes, disrupting the genes

b) Transposons cause large sections of the gene be deleted from the chromosome, making useless

c) Transposons cause sections of the chromosome make multiple copies of the same nucleotide

d) Transposons produce proteins that conflict with the normal functioning proteins the cell

e) Transposons cause nonfunctional genes to be ""woken up"" become unifunctional

The three steps that are required for DNA replication are ______.

a. unwinding, transcription, and translation

b. unwinding, complementary base pairing, and joining.

c. base doubling, unwinding, and joining

d. complementary base pairing, transcription, and translation

e. unwinding, base doubling, and base pairing.

If both parents express a particular trait, but their child does not, what does this indicate about the quality?

Discuss an example of ex vivo and of in vivo gene therapy.

The molecule that carries the message of the gene from the nucleus to the ribosome is __________.