DNA repair in eukaryotes and prokaryotes
A) relies on DNA polymerases to correct all mutations.
B) relies on completely different mechanisms.
C) is accomplished by multiple specialized pathways.
D) can only repair abnormal nucleotides such as pyridine dimers and depurinated bases.
E) is very ineffective.
Answer: C
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Which of the following problems can arise during posttranscriptional control?
A. Excising an exon from the pre-mRNA strand. B. Incomplete excising of all introns from the pre-mRNA strand, leaving fragments to be joined with the exons. C. Differential splicing of exons that can lead to an altered gene expression. D. All of these are errors that can occur during posttranscriptional control of gene expression.
An adult who is suffering from hyperthyroidism:a
is always tired. b. is often hungry. c. is overweight. d. is mentally slow. e. shows a lack of emotions.
Which method often results in colonies developing down throughout the agar and some colonies on the surface?
A. spread plate B. streak plate C. pour plate D. All of these choices are correct.
Which of the following is the best reason to classify Streptococcus in the Lactobacillales?
A) Gram reaction B) morphology C) fermentation of lactose D) rRNA sequences E) found in dairy products