Which of the following is NOT needed for transcription?
A. enzymes
B. DNA
C. RNA nucleotides
D. ribosomes
D. ribosomes
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What is common to all of the oxidation reactions in the Krebs cycle?
A. They all lead to the generation of NADH. B. They are all decarboxylation reactions. C. They are all characterized by a loss of electrons from an organic molecule coupled to the reduction of an electron acceptor. D. They all lead to substrate-level phosphorylation of ADP to generate ATP.
This type of lipid is found in pigments such as chlorophyll, in the visual pigment retinal, and in rubber:
A. steroid. B. wax. C. prostaglandin. D. terpene. E. phospholipid.
Which element(s) is common to all organic molecules?
A. oxygen B. nitrogen C. hydrogen D. carbon E. both nitrogen and carbon
A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro. A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro. This is an example of a(n) ________ mutation
A) nonsense B) missense C) silent D) frameshift E) inversion