Lactobacillus grows optimally at ________ pH.
A. very acidic
B. neutral
C. slightly acidic
D. slightly alkaline
Answer: C
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In its normal location in plant cells, tonoplast intrinsic protein apparently directly allows
a. water flow only into the chloroplast. b. water flow into the cell across the cell wall. c. water flow out of the cell across the cell wall. d. water flow both into and out of the vacuole. e. water flow only out of the chloroplast.
What advantages do placental mammals have
over montremes and marsupials?
a. higher metabolic rate b. better temperature homeostasis c. more efficient method of nourishing embryos d. offspring are more developed at birth e. all of these are placental mammal advantages
Bioengineered bacteria now produce
a. human insulin. b. human growth hormone. c. interferons. d. useful human proteins. e. all of these.
Acridines are mutagens that cause:
a. insertion mutations which result in frameshifts that are always lethal b. deletion mutations which result in frameshift mutations that are always lethal c. insertion mutations which result in frameshifts that can be lethal d. deletion mutations which result in frameshift mutations that can be lethal e. Both c and d