Ribosomal subunits ____________.
A. come together in threes to form functional units
B. are composed of mRNA and structural proteins
C. are synthesized in the cytoplasm
D. converge with tRNA when mRNA is to be translated
E. are transcribed from the complementary strand of DNA that is used for tRNA transcription
Answer: D
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The term
Indicate whether this statement is TRUE or FALSE.
Individuals with xeroderma pigmentosum inherit a faulty DNA repair mechanism. As a consequence, ____
a. they are sterile b. their cells have no proofreading abilities during DNA replication c. Okazaki fragments produced during DNA replication cannot be joined d. they easily develop skin cancer when exposed to sunlight e. their telomeres are shorter than average
In a haploid organism, most mitosis occurs
a. after fertilization and before meiosis. b. after meiosis and before fertilization. c. between meiosis I and II. d. during G1. e. in diploid cells.
Which statement about egg development is true?
A) Eggs without a nucleus cannot initiate division. B) A second messenger system is activated following fertilization. C) The sperm and egg micronuclei have fused by the end of the cortical reaction. D) The contents of the cortical granules contribute to the fast block to polyspermy. E) The mRNA involved with early activation of the egg arises from the sperm nucleus.