Which of the following cell types are dead at maturity?
A) spongy mesophyll
B) root hairs
C) palisade mesophyll
D) xylem
E) phloem
Answer: D) xylem
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Biology
- The osmoregulatory/excretory system of a freshwater flatworm is based on the operation of _____.
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- All of the following are directly involved in protein turnover except _______.
- Components of the transulfuration pathway include all of the following except _____.
- Homogentisate is an intermediate in the degradation of __________.
- Amino acids whose degradation yields a-ketoglutarate include all of the following except _________.
- Amino acids whose degradation yields succinyl-CoA includes all of the following except ________.
- Which of the following reactions require SAM?
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- Amino acids whose degradation yields acetyl-CoA include all of the following except ________.
- All of the following are referred to collectively as the branched chain amino acids except _________.
- The fixation of nitrogen requires _______.
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- All of the following are directly involved in the synthesis of deoxyribonucleic acid except _______.
- One-carbon carriers in metabolism include
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- SAM is a methyl donor in the synthesis of ______.
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- All of the following are purine bases except _____.