The directional nature of the DNA double helix is observed in the
A) locations of the hydrogen bonds.
B) locations of the numbered carbons in the sugars.
C) locations of the oxygen atom in the phosphate.
D) double helix when it is separated into single strands.
B) locations of the numbered carbons in the sugars.
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The spiracles and tracheae of insects have a function most similar to that of _____
A) rhinophores B) dorsal plummules C) cerata. D) chemoreceptors
Assume that a bacterial cell produces a Lac repressor that is able to bind to the operator sequence of the lac operon but
cannot bind allolactose. Explain the effect on transcription of the lac operon is the presence and absence of lactose.
What will be an ideal response?Human infants of low or very high birth weights are
less likely to survive than those of average weight. This outcome is an example of __________ selection. a. directional b. stabilizing c. balanced polymorphism d. disruptive e. gender
Controls over biosynthesis
What will be an ideal response?