Ques:Q: What do nearly all nonsense mutations lead to ? Choices: - dehydration - downs syndrome - hormone release - nonfunctional proteins A:

Ans:nonfunctional proteins
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Ques:Q: A change in the sequence of bases in dna or rna is called a what? Choices: - infection - isolation - accumulation - mutation A:

Ans:mutation
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Ques:Q: Acids and bases are important in living things because what proteins typically can perform their job only at a certain level of acidity? Choices: - hormones - vitamins - catalysts - enzymes A:

Ans:enzymes
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Ques:Q: What circulates with the blood or hemolymph and are often contained within specialized cells Choices: - structural pigments - muscular pigments - fat pigments - respiratory pigments A:

Ans:
respiratory pigments
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