Mutant forms of tumor-suppressor genes act _____; both copies of the gene must be _______ before their protective function is lost.

a) as dominant Mendelian traits, mutated or deleted
b) recessively, mutated or deleted
c) recessively, preserved
d) as dominant Mendelian traits, preserved


Ans: b) recessively, mutated or deleted

Biology & Microbiology

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a. a normal protein due to the redundancy of the genetic code. b. errors in DNA replication c. errors in DNA splicing d. a change in all mRNA codons downstream from the mutation e. a change in the third position of one codon

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The range of all factors that influence whether

a species can obtain resources essential for survival and reproduction is its a. habitat. b. niche. c. carrying capacity. d. ecosystem. e. community.

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A fastidious organism might be grown on which of the following types of media?

A) transport media B) reducing media C) enriched media D) differential media E) selective media

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Any substance that can cause an immune response is a/an:

A) microbe. B) nonspecific defense. C) antigen. D) interferon. E) antibody.

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