Which of the following nucleotide sequences could give rise to the amino acid sequence alanine-aspartic acid-glycine? Assume that translation initiation has already occurred.
A. CACCGCCGA
B. GCCGACGGC
C. GUUAAGAGG
D. GAUGGUGCU
E. UUUUAAUGG
Answer: B
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Most eukaryotic cells have a membrane-bound ________ that contains the genetic material
A) nucleus B) cytoplasm C) lysosome D) plasma membrane E) cell wall
Unsaturated fatty acids cause a membrane to be fluid at lower temperatures. What is a reasonable explanation for this?
a. Unsaturated fatty acids permit more water into the interior of the membrane. b. The double bonds form a kink in the fatty acid tail, forcing adjacent lipids to be spaced farther apart. c. The double bonds in the unsaturated fatty acids block interaction among the hydrophilic head groups of the lipids. d. Unsaturated fatty acids have a higher cholesterol content.
Which food components help your body build muscle mass?
What will be an ideal response?
Which of the following is important to the development of dorsal structures such as the neural tube and notochord?
A. Spemann's organizer B. noggin C. cadherins D. both Spemann's organizer and noggin E. both Spemann's organizer and cadherins