In humans, sex determination is genetic. Specifically, it depends on the presence or absence of the _____ gene residing on the _____ chromosome. The gene produces a protein called _____, which causes the developing gonad to differentiate
A. SRY; Y; TDF
B. SRY; X; TDF
C. TDF; X; SRY
D. TDF; Y; SRY
E. SRY; largest; TDF
A
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Membrane fluidity is affected by
A. temperature, cholesterol, types of fatty acids. B. size of molecules, polarity of molecules, temperature. C. types of fatty acids, waters affinity for hydrogen bonding. D. hyrophillic tails, hydrophobic heads, cholesterol.
A volcanic eruption carves the island into two populations (A1 and A2, 50,000 individuals each). The rodents cannot cross the lava even when it has cooled
Immediately after the eruption you take 100 individuals from each of populations A1 and A2, and sequence the same 100 base-pair gene region in the mitochondrial DNA (mtDNA) of each individual. You are shown a DNA sequence chosen at random from the total pool of 200 sequences; can you tell which population, A1 or A2, it comes from? A. yes B. no
Communities evolve to have greater biomass and species richness in a process called
A. sympatric interactions. B. adaptive modifications. C. succession. D. symbiotic relationships. E. competitive exclusion.
In the RNA sequence CAAUGACCAG, what will be the first amino acid incorporated?
A. methionine B. glutamine C. valine D. alanine E. glycine