The gene that codes for a protein capable of repressing an operon is called the ___

A. Operator
B. Structural locus
C. Regulator
D. Promoter
E. Terminator


Answer: C. Regulator

Biology & Microbiology

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Which of the following is not true of miRNA processing?

A. Drosha processes primary miRNA transcripts to precursor miRNAs. B. RISC binds to pre-miRNA in the cytoplasm. C. RNA helicase is necessary for unwinding the miRNA duplex. D. Dicer completes the processing by cleaving the single-stranded form of the miRNA.

Biology & Microbiology

Which of the following pressures is lower during inspiration than during expiration?

A) intra-alveolar pressure only B) transpulmonary pressure only C) intrapleural pressure only D) both intra-alveolar and transpulmonary pressures E) both intra-alveolar and intrapleural pressures

Biology & Microbiology

Refer to the accompanying figure. Which beetle phenotype has the highest probability of survival?


a. 1
b. 2
c. 3
d. 4
e. There is no difference in survival rate.

Biology & Microbiology

At which of the following checkpoints is the DNA checked for damage and, if damage is present, the cell is placed in G0 phase?

a. M b. G2 c. G1 d. None of these are correct.

Biology & Microbiology