As arthropods grow, they shed their exoskeletons at periodic intervals, allowing growth before formation of a new exoskeleton. This process of shedding the exoskeleton is known as:
A. expansion.
B. a growth spurt.
C. differentiation.
D. molting.
D
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The Sec system is used by
A. both Gram-positive and Gram-negative bacteria. B. neither Gram-positive nor Gram-negative bacteria. C. Gram-negative bacteria only. D. Gram-positive bacteria only.
A polypeptide chain is composed of:
a. amino acids b. proteins c. nucleic acids d. fatty acids e. monosaccharides
What is the correct order for the following events in excision repair of DNA? (1) DNA polymerase I adds correct nucleotides by 5?-to-3? replication; (2) damaged nucleotides are recognized; (3) DNA ligase seals the new strand to existing DNA; (4) part of a single strand is excised.
a. 1, 2, 3, 4 b. 2, 1, 3, 4 c. 2, 4, 1, 3 d. 3, 4, 2, 1 e. 4, 2, 3, 1
The lack of voluntary control over urination due to the inability to control the external urethral sphincter is called ________
A) urination B) renal failure C) micturition D) urinary incontinence