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()is a waste product of amino acid metabolism
发布时间:
2024-05-08 21:22:54
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1.
【单选题】The _____ supply the body with the oxygen needed for aerobic metabolism and eliminate the waste product carbon dioxide. 选项: A: throat B: trachea C: pharynx D: lungs
2.
The enzyme that add a phosphate to an amino acid is phosphatase, and the enzyme that remove a phosphate to an amino acid is protein kinase. 选项: A、正确 B、错误
3.
Because the genetic code is nonoverlapping, a missense mutation (from a single nucleotide change) results in the alteration of ______________, and the resulting protein has ______________.() 选项: A、only one codon / at least three amino acid changes B、three codons / a single amino acid change C、only one codon / a single amino acid change D、three codons / three amino acid changes
4.
Which of the following cannot be converted into glucose?选项: A:Lactic acid; B:Pyruvic acid; C:Glycogenic amino acid; D:Glycerol; E:Fatty acid
5.
In some patients with fulminant hepatic failure, the changes of plasma amino acid concentration manifest 选项: A:Increased aromatic amino acid (AAA), decreased branched chain amino acid (BCAA); B:Decreased AAA, increased BCAA; C:Increased both AAA and BCAA; D:Decreased both AAA and BCAA; E:No change in both AAA and BCAA
6.
Which mutation will change a single codon so that one amino acid in a protein is replaced with a different amino acid?选项: A:Silent mutations; B:Nonsense mutation; C:Missense mutation; D:Synonymous mutations
7.
The amino acid pattern refers to the composition ratio of various essential amino acids.选项: A:正确; B:错误
8.
Which kind of small molecules are the building blocks of proteins?( ) 选项: A、Glucose B、Nucleotide C、Amino acid D、Pyruvic acid E、Fatty acid
9.
What about inserting a base into the coding region of a gene? 选项: A、No impact B、It will change all amino acid sequences of the protein downstream of the insertion point C、Depending on the insertion point, it may have different effects on the protein D、An amino acid will be inserted into the protein sequence E、Three amino acids will be inserted into the protein sequence
10.
What is the best evidence that genes encode the amino acid sequence of proteins? 选项: A、Proteins are macromolecules B、The amino acid of polypeptide is changed by gene mutation C、DNA serves as a template for RNA D、mRNA is found in the ribosome
11.
The shape of a protein is specified by its amino acid sequence。( )选项: A:对 B:错
12.
Which of the following statements is correct ( )选项: A:A total of 20 different codons represent the genetic code;; B:Different codons may encode the same amino acid;; C:The third bit of the codon has variability.; D:Each nucleotide triplet encodes an amino acid;
13.
Which of the following statements is correct ( )选项: A:A total of 20 different codons represent the genetic code;; B:Different codons may encode the same amino acid;; C:The third bit of the codon has variability.; D:Each nucleotide triplet encodes an amino acid;
14.
A polypeptide with 100 amino acids are synthesized. How many energy molecules of ATP will consumed in the whole process including amino acid activation, attachment, initiation, elongation and termination?
15.
The main component of the extracellular matrix is ( ).选项: A:collagen; B:amino acid; C:glucose; D:water
16.
What
about inserting a base into the coding region of a gene?() 选项: A、No
impact B、It
will change all amino acid sequences of the protein downstream of the
insertion point C、Depending
on the insertion point, it may have different effects on the protein D、An
amino acid will be inserted into the protein sequence E、Three
amino acids will be inserted into the protein sequence
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