If a codon for alanine is GCA, then the anticodon is ________.
A. CGU
B. UGC
C. GCA
D. ACG
E. CGT
Answer: A
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In the first step of their experiments, Jacob and Monod treated E. coli cells with ultraviolet light or X-rays to _____
A) decrease the rate of gene expression B) induce DNA repair enzymes C) increase the frequency of mutations in all genes D) selectively mutate the lac operon, leaving all other genes unmutated
Nitrifying Archaea such as Nitrosopumilus maritimus use ________ as a sole carbon source and are capable of obtaining sufficient energy by aerobically oxidizing ________
A) CO2 / NO B) sugars / NH3 C) CO2 / NH3 D) organic acids / NO
What are the primary sources of compounds used to develop antibiotics?
a. tree and flower extracts b. snake and scorpion venom c. bacteria and fungi d. fermented fruit sugars
The step involving ATP, hexokinase, and the phosphorylation of glucose to glucose-6-phosphate is
A. an example of oxidative phosphorylation. B. an example of photophosphorylation. C. the final step of the Krebs cycle. D. the first redox reaction of the electron transport system. E. an example of substrate-level phosphorylation.