A mutation causes a G to be inserted after the first base of the codon for tryptophan. How will this affect the growing polypeptide chain?
A) It will not be affected.
B) Elongation will stop prematurely.
C) There will be a single amino acid substitution.
D) The reading frame will be shifted to the left, and the wrong amino acids will be added from this point on.
E) None of these
D
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Which one of the following is an adaptation shared by virtually all complex multicellular organisms that allows the organisms to receive the oxygen and nutrients they need?
A. amplification of surface areas B. active transporters for oxygen and glucose C. restricted body size that corresponds to the environment D. tissues or organs that function as pumps
Which of the following is not true of gene regulation by DNA looping?
A. The precise distance between the regulatory sequence and the promoter is important. B. It can result in gene repression. C. It can result in gene activation. D. It can result in the regulation of a gene even thousands of base pairs away from the regulatory site.
The amount of time the cell takes for interphase is approximately 1 hour, plus or minus about 5 minutes.
Answer the following statement true (T) or false (F)
Hydrophobic as well as hydrophilic interactions would be important for which of the following types of molecules?
A. Proteins B. Unsaturated fats C. Glycogen and cellulose D. Polynucleotides E. All of the above