Which macromolecule has a sugar-phosphate backbone?
A) lipid
B) nucleic acid
C) protein
D) polysaccharide
B
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Which of the following locations is the main reservoir for nitrogen in the nitrogen cycle?
A) atmosphere B) sedimentary bedrock C) fossilized plant and animal remains (coal, oil, and natural gas) D) plant and animal biomass E) soil
During DNA replication, which enzyme removes the RNA primers and then fills in the gap?
A. DNA pol I B. DNA primase C. DNA pol III D. DNA ligase
Which curves on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?
A) curves 1 and 5 B) curves 2 and 5 C) curves 3 and 4 D) curves 3 and 5
Cell condition in which only one of each type of chromosome is present.
What will be an ideal response?