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【单选题】
下列关于委付的说法哪一种是正确的( )A.
委保险人提出
B.
委付必须以实际全损为条件
C.
委付必须以推定全损为条件
D.
保险人可拒绝接受委付
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举一反三
【单选题】A polypeptide has the amino acid sequence glycine – arginine – lysine – serine. The table gives possible tRNA anticodons for each amino acid. Which sequence of bases on DNA would code for the polypept...
A.
CCACGCAAGAGC
B.
CCTTCCTTCTCG
C.
GGAAGGAAAAGC
D.
GGTTGGTTGTGC
【单选题】Release of amino acid nitrogen and NH4+ is an important step in generating precursors for the urea cycle. Which statement best describes this release of amino acid nitrogen as NH4+ from amino acids?
A.
NH4+ freely diffuses across membranes.
B.
Glutamate deamination by oxidation is readily reversible.
C.
Serine deamination to pyruvate is readily reversible.
D.
Glutamine deamination to glutamate is readily reversible.
E.
NH3 cannot freely diffuse across membranes.
【简答题】画像;(对某事物的)描绘
【单选题】The amino acid pool allows for constant substrates to be available for numerous bodily uses. Which statement below best describes this amino acid pool?
A.
Approximately 80% of the body ’ s total protein is in the amino acid pool.
B.
Dietary proteins constitute most of the amino acid pool.
C.
The concentration of free amino acids is as rigidly controlled as blood glucose levels.
D.
The synthesis of new protein is the major use of amino acids in the amino acid pool.
E.
Changes in the rate of protein synthesis and degradation occur within seconds to minutes.
【简答题】画像,(对某事物的)描绘 n.
【简答题】画像,(对某事物)的描述
【单选题】An individual has been shown to have a deficiency in an intestinal epithelial cell amino acid transport system for leucine. However, the individual shows no symptoms of amino acid deficiency. This cou...
A.
The body synthesizes leucine to compensate for the transport defect.
B.
The kidney reabsorbs leucine and sends it to other tissues.
C.
There are multiple transport systems for leucine.
D.
Isoleucine takes the place of leucine in proteins.
E.
Leucine is not necessary for bulk protein synthesis.
【单选题】An individual has been diagnosed with Hartnup disease and is experiencing symptoms consistent with niacin deficiency. In this patient, which amino acid is no longer able to “ spare ” the dietary requi...
A.
Alanine
B.
Tryptophan
C.
Glutamine
D.
Leucine
E.
Methionine
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