The capsid is composed of protein subunits called
A) spikes
B) protomers
C) virions
D) capsomeres
Ans: D) capsomeres
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Integration of linear transforming DNA into the chromosome
A) is not required for the expression for the transformed genes. B) is catalyzed by the RecA gene. C) almost never occurs because restriction endonuclease will degrade the DNA before it is integrated. D) only occurs in laboratory-based systems in artificial competent cells.
Glucose moves through a protein transporter down its concentration gradient into the cell. This is an example of ____
a. diffusion b. endocytosis c. exocytosis d. osmosis e. facilitated diffusion
Which of the following areas of the respiratory tract is lined with a single layer of epithelial cells?
a. nasal cavity b. larynx c. trachea d. bronchi e. alveoli
A man has extra digits (six fingers on each hand and six toes on each foot). His wife and their daughter have a normal number of digits. Having extra digits is a dominant trait. The couple's second child has extra digits
What is the probability that their next (third) child will have extra digits? A) 1/2 B) 1/16 C) 1/8 D) 3/4