Suppose that you extract all of the proteins of a leaf and measure the percentage that is rubisco. What percentage of the leaf proteins will the rubisco comprise?
a. 10%
b. 25%
c. 50%
d. 75%
Answer: c. 50%
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The annual growth rings seen in trees are made up of
a. apical meristem. b. cork cambium. c. vascular cambium. d. both apical meristem and cork cambium.
Of all the different codons that exist, three of
them
a. are not used in any organisms. b. do not code for an amino acid. c. code for non-functional amino acids. d. signify ‘start here’. e. do more than one of these things.
Which uses synthetic DNA plus DNA cloning techniques to introduce nucleotide changes at specific sites?
a. artificial chromosome synthesis b. ligation c. oligonucleotide replacement d. site-directed mutagenesis
The conversion of nitrate (NO3-) to nitrogen gas (N2) is called
A. photosynthesis. B. denitrification. C. nitrification. D. ammonification. E. nitrogen fixation.