Which of the following molecules was NOT present in the prebiotic environment?
a. methane (CH4)
b. hydrogen sulfide (H2S)
c. water (H20)
d. ammonia (NH3)
e. molecular oxygen (O2)
Ans: e. molecular oxygen (O2)
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Which of the following is not a function of the signal recognition particle (SRP)?
A. halts translation B. binds to the ribosome C. binds to the channel in the rough endoplasmic reticulum D. targets certain proteins to be synthesized on the rough endoplasmic reticulum
Interspecific genome studies show us conserved sequences, but intraspecific comparisons identify what?
What will be an ideal response?
The cytostatic factor that holds the oocytes at the arrest point is called
a. Fos. b. Kos. c. Mos. d. Boss.
Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis?
A. haploid with one copy of each gene B. haploid with two copies of each gene C. diploid with two copies of each gene D. diploid with four copies of each gene