Some enzymes lower activation energy by ____.
A. keeping substrates apart
B. orienting substrates randomly
C. breaking the laws of thermodynamics
D. shutting out water molecules
E. physically breaking chemical bonds
Answer: D
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Which of the following statements about the breakdown of carbohydrates is false?
A. Aerobic respiration is very efficient and captures the majority of the energy available in each glucose molecule in a usable form (ATP). B. During glycolysis, starches are broken down into two molecules of pyruvate. C. Glycolysis does not require oxygen. D. ATP is produced during both glycolysis and oxidative phosphorylation. E. Glycolysis occurs in the cytosol, whereas the citric acid cycle occurs in the mitochondria.
Which of the following is not a characteristic of nematodes?
A. They have bilateral symmetry. B. They exhibit cephalization. C. They are unsegmented. D. They have a coelom. E. They have a complete digestive tract.
Cdks bind with ________, enabling the Cdks to function as enzymes
A) kinases B) histones C) p53 D) cyclins E) MPF
Any two nucleic acid fragments will spontaneously hybridize if they encounter each other as long as they are ________ and ________
A) DNA; RNA B) transcribed; translated C) primed; replicated D) identical; compatible E) complementary; antiparallel