Which of the following statements best explains why microbial geneticists initially focused on regulation of gene expression at the transcriptional, rather than the translational, level?
A. Cellular regulation of transcription is common to all prokaryotic cells.
B. The process of transcription was best understood by researchers at the time.
C. The process of synthesizing an mRNA transcript is much less complex than translation of mRNA into protein.
D. By regulating the first step of protein synthesis, cells conserve the greatest amount of energy.
Answer: D
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The stage of mitosis characterized by the physical separation of sister chromatids is called:
A. Anaphase B. Metaphase C. Prometaphase D. Telophase
Four of the five answers listed below are
produced by the same germ layer. Select the EXCEPTION.
a. nervous system b. muscle system c. circulatory system d. reproductive system e. excretory system
__________ selection favors intermediate forms of a trait whereas __________ selection favors
extreme forms. Fill in the blank(s) with the appropriate word(s).
If you only inherit one mutated copy of BRCA1 and the other copy is normal, you will not develop breast cancer.
Answer the following statement true (T) or false (F)