After mRNA processing, remainin the final product to be expressed duringtranslation.

a. intronsb. exonsc. transposonsd. hitonese. plasmids

Answer: b

If cytosine makes up 22% of thenucleotides in a sample of DNA from anorganism, then adenine would make upwhat percent of the bases?a. 22%b. 44%c. 28%d. 56%e. It cannot be determined from information given.

Answer: c

What kind of chemical bonds are foundbetween paired bases of the DNA doublehelix?

a. hydrogenb. ionicc. covalentd. sulhydryle. phosphate

Answer: a

Which enzyme catalyzes the elongationof a DNA strand in the 5’---3’ direction?

a. primaseb. DNA ligasec. DNA polymerased. topoisomerasee. helicase

Answer: c

Prokaryotic genetic material does not include

a. DNAb. mRNAc. tRNAd. rRNAe. histones

Answer: e

Meselson and Stahl grew bacteria in a medium containing N15 and then transferred them to a medium containing N14. Which of the results would be expected after two DNA replications?a. One band of N15 DNAb. One band of N14 DNA and one band of N15 DNAc. One band of N14 DNAd. One band of hybrid N14-N15 DNAe. One band of N14 DNA and one band of hybrid N14-N15 DNA

Answer: e

The previous experiment proved DNA is

a. conservative.b. semiconservative.c. dispersive.d. radical.e. degenerative

Answer: b

The movement of a piece of onechromosome to another chromosome causing Cri-du-Chat syndrome is

a. translocation.b. transduction.c. transformation.d. transplantation.e. trangenesis.

Answer: a

a. Transcription b. Translation c. Transformation

d. Replication

11. what Griffith showed12. happens in the cytoplasm13. makes mRNA

Answer: c

Answer: b

Answer: a

A particular eukaryotic protein is 300amino acids long. Which of the followingcould be the number of nucleotides in theDNA that codes for this protein?

a. 3b. 100c. 300d. 900e. 1800

Answer: e

All of the following are directly involvedwith translation except

a. mRNAb. tRNAc. rRNAd. ribosomese. DNA

Answer: e

As a ribosome translocates along a mRNAMolecule by one codon, which of theFollowing occurs?a. The tRNA that was in the A site moves to the P site.b. The tRNA that was in the P site moves to the A site.c. The tRNA that was in the P site departs from the ribosome in the E site.d. The tRNA that was in the A site departs from the ribosome.e. Both a and c are correct. Answer: e

All of the following are transcribed fromDNA except

a. exons.b. protein.c. rRNA.d. tRNA.e. miRNA.

Answer: b

A possible sequence of nucleotides inDNA that would code for the polypeptidesequence phe-leu-ile-val would be

a. 5’-TTG-CTA-CAG-TAG-3’b. 3’-AAC-GAC-GUC-AUA-5’c. 5’-AUG-CTG-CAG-TAT-3’d. 3’-AAA-AAT-ATA-ACA-5’e. 3’-AAA-GAA-TAA-CAA-5’

Answer: e

What amino acid sequence will be generated based on the following mRNAcodon sequence?

5’-AUG-UGG-CAU-UCG-UGU-3’a. met-trp-gln-ser-cysb. met-trp-his-cys-cysc. met-cys-his-ser-cysd. met-trp-his-ser-cyse. met-trp-his-cys-ser

Answer: d

A frameshift mutation could result from

a. a base deletion only.b. a base insertion only.c. a base substitution only.d. deletion of three consecutive bases.e. either an insertion or a deletion of a base.

Answer: e

DNA replication can best be described as

a. semiconservative.b. conservative.c. degenerative.d. dispersive.e. radical.

Answer: a

In DNA replication, DNA polymerase catalyzes the reaction in which

a. the double helix unwinds.b. the sugar-phosphate bonds of each strand are broken.c. a phosphate group is added to the 3’-carbon or 5’-carbon of ribose.d. a nucleotide with a base complementary to the base on the template strand is added to the new DNA strand.e. the two nucleotide strands come together and intertwine to form a double helix. Answer: d

In order for a bacterium to produce a eukaryotic protein, which of the following must first be isolated from a eukaryotic cell prior to cloning?

a. The protein’s primary RNA transcript from the nucleusb. The protein’s mRNA from the cytoplasm.c. The protein from the rough endoplasmic reticulumd. The introns from the segment of DNA that codes for the proteine. The segments of DNA that control transcription for this protein Answer: b

A. Crossing overB. InversionC. TranslocationD. NondisjunctionE. Deletion

1. Part of a chromosome breaks away and then reattaches to the same chromosome in reverse orientation.2. Part of a chromosome breaks away and attaches to a non-homologus chromosome.3. Part of a chromosome lacking a centromere breaks away and does not reattach to another chromosome.4. Tetrads fail to separate correctly during anaphase in this process.

Answer: B

Answer: C Answer: E

Answer: D

Cells that contain only circular chromosomes are most probably which of the following?

a.protist cellsb.fungal cellsc.bacterial cellsd.plant cellse.animal cells

Answer: c