Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine, and cytosine forms hydrogen bonds with guanine. What is the significance of the structural arrangement?

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#Question id: 12053

#Unit 7. System Physiology – Animal

Swallowing is a complex process that involves signaling between the pharynx and swallowing center in the brainstem. Which of the following structures is critical for determining whether a bolus of food is small enough to be swallowed?

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#Question id: 7752

#Unit 5. Developmental Biology

The autophagy pathway included____

a) the catabolic mechanism that delivers cellular components to lysosomes, where they are degraded

b) Autophagy protects the cell from the harmful or lethal effects of damaged or unnecessary proteins and organelles

c) During starvation, the autophagic breakdown and recycling of cellular components also

ensure cellular survival by maintaining cellular energy levels

Which of the following are the correct prediction about autophagy is true?

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#Question id: 7180

#Unit 5. Developmental Biology

Development of tetrapod limb has to function in a three dimensional coordinated system:

Proximal-distal axis by ____a_____

Anterior-posterior axis by ___b_____

Dorsal-ventral axis by ______c____

Which of the following combinations are correct?

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#Question id: 3387

#Unit 11. Evolution and Behavior

Observe the following hypothetical populations Which of these populations, if any, is in Hardy-Weinberg equilibrium

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#Question id: 14700

#Unit 13. Methods in Biology

One mapping is selected at random from all the mappings from the set S = {1,2,3,...n} into itself. The probability that the selected mapping is one to one is