Which enzymes hydrolyze specific ester bonds that connect the different building blocks that make up a phospholipid molecule?
a) phospholipid dephosphorylase
b) phospholipases
c) phospholipid phosphatases
d) phospholipid kinases
Ans: b) phospholipases
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You believe that an adult animal you are examining is a vertebrate but concede that it may be an invertebrate chordate. Which of the following would ensure that you are indeed looking at a vertebrate?
A) It is able to swim. B) It lacks a notochord. C) Its notochord functions as an endoskeleton. D) It uses its pharyngeal gill slits for respiration. E) It has a dorsal hollow nerve cord.
Which of the following is not true of the reactions that methylate the 5' end of the primary mRNA transcripts?
A. The reaction occurs after the entire transcript is synthesized. B. The methyl groups are derived from S-adenosylmethionine. C. The enzymes that catalyze the reactions are guanylyltransferases. D. The enzymes that catalyze the reactions are associated with the C-terminal domain of RNA polymerase II.
Which of the following scientists revolutionized biology by demonstrating that living organisms were also governed by the laws of physics and chemistry by synthesizing urea in the laboratory from ammonium cyanate?
A) Wöhler B) van Leeuwenhook C) Mendel D) Schwann E) Rohrer
A trait that confers ________ in one environment might make an organism less able to survive and reproduce in another environment
A) selection B) fitness C) adaptation D) alleles