Which of the following is a characteristic of a bacteriophage?
A. Is a naked virus
B. Is the most common cause of the common cold
C. Has a spiked protein coat
D. Infects animals
E. Has a lipid envelope
Answer: A
Biology & Microbiology
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Particular mutations in the cystic fibrosis transmembrane conductance (CFTR) gene result in a CFTR
molecule that transports sodium ions poorly or not at all.
Indicate whether the statement is true or false.
Biology & Microbiology
In a dihybrid cross AA bb × aa BB, what proportion of the F2 offspring is expected to be homozygous for at least one gene?
A) 1/4 B) 1/2 C) 3/4 D) All are homozygotes. E) None are homozygotes.
Biology & Microbiology
Which lymph structure is central to the body's immunity?
a. Thoracic duct b. Bone marrow c. Thymus d. Spleen e. Lymph node
Biology & Microbiology
A chemical reaction that has a positive ?G is best described as _____
A) endergonic B) enthalpic C) spontaneous D) exergonic
Biology & Microbiology