Which type of regulatory protein(s) is/are present in Archaea?
A) Activators that stimulate RNA polymerase activity are present in Archaea.
B) Repressors that block RNA polymerase activity are present in Archaea.
C) Both activators and repressors are present in Archaea.
D) Similar to regulation in Eukarya, Archaea lack bacterial-like regulators such as activators and repressors and use transcription factors instead.
Answer: B
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A. integrins promote the activation of signaltransduction pathways. B. integrins are kinases. C. extracellular matrix proteins are receptors and integrins are ligands.
Which molecule contains the least stored chemical energy?
a. ethyl alcohol b. pyruvate c. glucose d. lactate e. oxygen
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a) chloroplast b) ribosome c) golgi apparatus d) mitochondria
High Temperature Short Time (HTST) pasteurization method involves holding of the milk at 72o C for at least 15 seconds
a. true b. false