In a phospholipid, the phosphate would be found in which part of a membrane?
A. in the bilayer, shielded from water.
B. on the surface of the membrane, interacting with water.
C. in the bilayer, interacting with water.
D. on the surface of the membrane, shielded from water.
Answer: B
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A researcher is studying several different Rhodnius mutants. One of her mutants only molts normally up until the 2nd nymph stage. After that, insects continue to molt but keep demonstrating body plans of the 2nd nymph stage
What is the likely effect of this mutation in Rhodnius? Choose all that apply. A. The juvenile hormone is not expressed B. The ecdysone hormone is not expressed C. The prothoracicotropic hormone (PTTH) is not expressed D. The juvenile hormone is over-expressed E. The ecdysone hormone is over-expressed F. The prothoracicotropic hormone (PTTH) is over-expressed
Which of the following blotting techniques allows a researcher to determine the number of copies of a gene within the genome of an organism?
A. Western blotting B. colony hybridization C. Northern blotting D. Southern blotting E. Eastern blotting
Restriction enzymes cut double-stranded DNA
a. between genes. b. at specific base sequences c. between bacterial and viral DNAs. d. between purines and pyrimidines. e. between promoter and operator DNA sequences.
Aerobic respiration and anaerobic respiration use different ________, while chemolithotrophs and chemoorganotrophs use different ________
a. proton motive force / photophosphorylation b. electron acceptors / electron donors c. types of phosphorylation / carbon sources d. electron donors / electron acceptors