Which of the following carbohydrates is the
most abundant in the biosphere?
a. glucose
b. starch
c. glycogen
d. sucrose
e. galactose
A
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A scientist obtains the DNA sequence datafor a bacterial plasmid. The data includes As, Ts, and Gs, but no Cs. What
is the most likely cause of this result?
a. ddCs were omitted from the sequencing reaction. b. The cytosine deoxyribonucleotides were omitted from the sequencing reaction. c. DNA polymerase was omitted from the sequencing reaction mix. d. The ddG fluorescent tags were degraded. e. There is no cytosine in this DNA molecule.
The most abundant protein in mammals is collagen. This strong, ropelike molecule is particularly abundant in which tissue?
A. Skeletal muscle B. Ligaments C. Spinal cord D. Heart muscle
Which of the following represents energy flow
in a grazing food web? a. producers >>> detritivores >>> decomposers b. producers >>> decomposers >>> detritivores c. producers >>> herbivores >>> decomposers >>> carnivores d. producers >>> herbivores >>> carnivores >>> decomposers e. producers >>> herbivores >>> detritivores >>> carnivores
Pulmonary surfactant functions by:
a. increasing the cohesive forces of water molecules. b. increasing the surface tension of water. c. moving water across respiratory surfaces. d. preventing the alveoli from expanding. e. increasing the energy required to stretch the lungs.