The chemical bonds in peptidoglycan can be hydrolyed by the enzyme ________, found in tears and saliva.
A. kinase
B. lysozyme
C. penicillinase
D. peptidase
Answer: B
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________ act as proton pumps and keep the internal proton concentration of lysosomes high.
Fill in the blank(s) with the appropriate word(s).
Female fireflies identify males by their flashing patterns, which are often so complicated that signals sent by one
species cannot be understood by another species. This reproductive isolating mechanism is called ____.v
a. ecological isolation b. gametic isolation c. temporal isolation d. behavioral isolation e. mechanical isolation
The polymerase chain reaction
A. can provide sufficient DNA for analysis from a small sample of biological material at the scene of a crime. B. uses a restriction enzyme. C. requires a heat-resistant polymerase. D. can provide sufficient DNA for analysis from a small sample of biological material at the scene of a crime and requires a heat-resistant polymerase. E. uses a restriction enzyme and can provide sufficient DNA for analysis from a small sample of biological material at the scene of a crime.
One of the ways smooth endoplasmic reticulum (ER) differs from rough endoplasmic reticulum is that rough ER is covered by
a. the extracellular matrix. b. the Golgi apparatus. c. ribosomes. d. the cytoskeleton. e. mitochondria.