Which of the following statements best describes common variable immunodeficiency?

A. Symptoms appear in infancy.
B. It is inherited as an X-lmked recessive.
C. It is invariably fatal for the patient.
D. There is a deficiency of IgA, IgG, or both.


Ans: D. There is a deficiency of IgA, IgG, or both.

Biology & Microbiology

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The endocrine gland that is often called the master gland because of its influential role in regulating the other endocrine glands is the

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The plant hormones ____ appear to regulate the expression of genes associated with a plant's growth responses to

light.

a. salicylic acid b. brassinosteroids c. gibberellins d. jasmonates e. oligosaccharins

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The Protenor mode of sex determination is the ________

A) XO/YY scheme B) XX/XO scheme C) hermaphroditic scheme D) scheme based on F plasmids inserted into the FMR-1 gene E) scheme based on single translocations in the X chromosome

Biology & Microbiology

All of the following can be used to culture animal viruses EXCEPT

a) laboratory animals b) cell culture. c) embryonated eggs. d) glucose broth.

Biology & Microbiology