What are the three main functions of cellular localization of mRNAs?
What will be an ideal response?
Ans: 1) Localization of specific mRNAs in oocytes are a prelude to future patterns of cellular differentiation in the embryo. 2) mRNAs are localized in asymmetric cell divisions, producing daughter cells that are not identical. 3) mRNA localization precedes the compartmentalization of a cell into specialized regions; for example, neurons have axons and dendrites that grow as the result of the activities of specific proteins whose mRNAs are localized to specific locations in the cell.
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Which of the following organisms is NOT a
cephalopod?
a. slug b. octopus c. squid d. nautilus e. more than one of these is NOT a cephalopod
Select the enzyme that does not match the reaction:a
sucrase?splits sucrose into glucose and fructose b. lipase?breaks ester linkages c. phosphatase?removes phosphate groups d. urease?converts urea to ammonia and CO2 e. kinase?breaks peptide bonds
Unlike most animals, humans engage in sexual intercourse for pleasure as much or more than for the purpose of reproduction
The process of intercourse is characterized by several phases designed to heighten the arousal, excitement, and/or pleasure associated with contact with a partner. If a man or woman was not easily aroused, or even could not be, is sperm transfer to a woman possible, and in turn, is it possible for fertilization to occur?
The human chromosomes that do not determine gender are
a)not found in pairs. b)the "X" and "Y" chromosomes. c)autosomes. d)called sex chromosomes. e)None of the answers are correct.