Enzymes in the digestive tract catalyze hydrolysis reactions.
a. true
b. false
Ans: a. true
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Which of the following is not true about the role of Mediator complex in transcription initiation?
A. Mediator binds to RNA polymerase II. B. Mediator binds to upstream enhancer sequences. C. Mediator binds to general transcription factors. D. Mediator binds to transcription activators. E. Mediator increases the rate of the assembly of the preinitiation complex.
Both smooth muscle fibers and cardiac muscle fibers:a
have striations. b. are under involuntary control. c. are multinucleate. d. have a comparable intermediate resistance to fatigue. e. have a comparable intermediate speed of contraction.
The site of communication between a neuron and a muscle fiber is called a
A) Z disc. B) myofibril. C) sarcomere. D) neuromuscular junction.
Answer the following questions true (T) or false (F)
1. Watson and Crick's experiments involved isolating DNA, generating X-ray diffraction images of the DNA, and building a model of its structure. 2. The structure of DNA allows the molecule to store information. 3. Base-pairing rules apply from one DNA strand to its partner, but not along the sugar-phosphate "handrails" of a DNA strand.