How is it possible that there are four times as many kinds of mRNA transcripts as there are genes in the human genome?
What will be an ideal response?
This is possible because human genes are fragmented and use alternative splicing.
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matching the items with the most appropriate group
a. —COOH b. —CH3 c. —NH2 d. —OH e. C O f. —PO43- g. —CHO E 92. the amine group E 93. the carboxyl group M 94. the group that is acidic M 95. the group that occurs repeatedly in sugars E 96. the methyl group E 97. the hydroxyl group D 98. the carbonyl group of fructose M 99. the group on the amino-terminal end of proteins M 100. the group on the carboxyl-terminal end of proteins D 101. the group that distinguishes glucose from fructose M 102. the group typical of energy carriers such as ATP
Fick's law of diffusion describes the factors that influence the diffusion of respiratory gases across biological membranes like gills and lungs
Diffusion rate = k × A × (P2 - P1)/D. Natural selection is LEAST likely to act upon which variable in Fick's law? A) A B) k C) P2 - P1 D) D
The exotoxin produced by Corynebacterium diphtheriae
A. causes an inflammatory response. B. may destroy cardiac and kidney tissue. C. causes the formation of a pseudomembrane on the respiratory mucosa. D. All of the choices are correct.
The F2 phenotypic ratio of 9:3:4 is a result of a cross
involving a. two genes expressing complete dominance. b. a gene expressing dominance and another gene expressing codominance. c. two genes expressing codominance. d. epistasis, in which one gene modifies the expression of the other gene. e. multiple alleles.