Which of the following shows the correct linkage of amino acids in a protein?
A. amino group of one bonded to the amino group of the next
B. acid group of one bonded to acid group of the next
C. acid group of one bonded to amino group of the next
D. All of these answers are correct.
C. acid group of one bonded to amino group of the next
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There are sixty-one codons that each specify the addition of a specific amino acid, and three stop codons for which there is no corresponding amino acid. However, there are only about forty tRNA molecules, representing forty anticodons
How is that possible? A) Only about forty of the recognized sixty-one codons are present in mRNA. B) An anticodon forms hydrogen bonds with the codon; it must match the first two bases of the codon, but is less specific with respect to the third base. C) There are tRNAs that can bind one of two related amino acids. D) Only twenty of the codons are activeâ€"one for each amino acid.
Mycobacterium tuberculosis is very difficult to stain because of the
A) presence of ribosomes in the cytoplasm. B) location of the DNA within the cell. C) large amounts of a waxy lipid present in its cell wall. D) lack of a cell wall.
These structures are held together by cohesin:
A. Homologous chromosomes B. Solenoids C. Sister chromatids D. Nucleosomes
If a cell's lysosomes burst, the cell would ________
A) shrivel B) divide into two cells C) digest itself D) need to manufacture more lysosomes