Please answer all questions! Only answer if you know! Thank you. 1) The bacteria
ID: 83716 • Letter: P
Question
Please answer all questions! Only answer if you know! Thank you.
1) The bacterial chromosome is
A) usually circular.
B) found in a nucleoid.
C) found in a nucleus.
D) both circular and found in a nucleoid.
E) both circular and found in a nucleus.
2) Which of the following statements is true of bacterial plasmids?
A) They are found in the nucleoid.
B) They can replicate autonomously.
C) They carry genes for essential metabolic functions.
D) They are small circular DNA molecules.
E) They are small circular DNA molecules that can replicate autonomously.
3) DNA helicases
A) break hydrogen bonds between complementary nucleotides.
B) synthesize short DNA molecules important for the function of DNA polymerase.
C) seal gaps between DNA fragments.
D) proofread DNA molecules.
E) assist in recognition of promoters during transcription.
4) Which of the following statements concerning transcription in bacteria is FALSE?
A) It occurs in the nucleoid region.
B) Sigma factors are parts of RNA polymerase that recognize promoter regions.
C) The same RNA polymerase transcribes primer RNA, mRNA, tRNA, and rRNA.
D) Termination is either self-induced or due to the presence of Rho protein.
E) There are a variety of sigma factors that affect transcription.
5) The AUG codon functions in coding for the amino acid methionine and as a
A) termination signal.
B) start signal.
C) "wobble" codon.
D) marker for introns.
E) recognition site for RNA polymerase.
6) Which of the following are considered to be frameshift mutations?
A) insertions
B) inversions
C) deletions
D) both inversion and insertions
E) both deletions and insertions
7) The horizontal transfer process known as transduction
A) involves a virus.
B) requires a pilus.
C) requires a cell to be "competent."
D) requires a plasmid.
E) involves a mutagen.
8) In conjugation, F+ cells
A) serve as recipient cells.
B) contain an F plasmid.
C) do not have conjugation pili.
D) can transfer DNA only to other F+ cells.
E) contain "jumping genes."
9) Which of the following is characteristic of prokaryotic genomes but not eukaryotic genomes?
A) histones
B) circular chromosomes
C) linear chromosomes
D) enclosed in a nuclear membrane
E) typically consist of a few to several chromosomes
10) Genetic elements known as promoters are initiation points in the process of
A) DNA replication.
B) transcription.
C) translation.
D) mutation repair.
E) transformation.
11) Codons are recognized during
A) translation.
B) transcription.
C) base excision.
D) DNA replication.
E) transduction.
12) __________ is initiated at sequences called origins.
A) DNA replication
B) Translation
C) Splicing
D) Transcription
E) Transposition
13) The process of __________ requires the activity of DNA ligase.
A) translation
B) capping
C) transcription
D) DNA replication
E) transduction
14) RNA polymerase is primarily responsible for
A) DNA replication.
B) translation.
C) transcription.
D) transformation.
E) polyadenylation
15) The process of __________ requires participation of tRNA molecules.
A) DNA replication
B) capping
C) transcription
D) translation
E) dark repair
1) Describe the basic similarities and differences between DNA replication and transcription.
2) Describe the various types of nucleic acids that are typically found in cells.
3) Discuss some of the consequences of the significant differences in transcription between prokaryotes and eukaryotes.
Explanation / Answer
The answers are
1. B) found in a nucleoid.
2. E) They are small circular DNA molecules that can replicate autonomously.
3. A) break hydrogen bonds between complementary nucleotides.
4. C) The same RNA polymerase transcribes primer RNA, mRNA, tRNA, and rRNA.
5. B) start signal.
6. E) both deletions and insertions
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