Which macromolecule(s) is/are critical in the active site of the ribosome for catalysis of peptide bond formation?

A. ribosomal RNA and protein
B. ribosomal protein
C. ribosomal RNA, protein, and carbohydrate
D. ribosomal carbohydrate
E. ribosomal RNA


Ans: E. ribosomal RNA

Biology & Microbiology

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A temperate phage

A. may be lysogenic. B. may be lytic. C. enters a lysogenic or lytic life cycle shortly after entering the host cell. D. are all RNA viruses. E. may be lysogenic AND enters a lysogenic or lytic life cycle shortly after entering the host cell.

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Small trees are often the same age as large individuals in the canopy

Indicate whether the statement is true or false

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Clumped dispersion is often influenced by all of the following except:a

the presence of family groups. b. asexual reproduction in plants or invertebrates. c. limited seed dispersal in plants. d. a patchy distribution of resources. e. nesting territoriality.

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Transcription of a part of DNA molecule with a nucleotide sequence of A-A-A-C-A-A-C-T-T results in a mRNA molecule with the complementary sequence of

A. G-G-G-A-G-A-A-C-C B. U-U-U-C-U-U-C-A-A C. U-U-U-G-U-U-G-A-A D. T-T-T-G-A-A-G-C-C E. C-C-C-A-C-C-T-C-C F. None of these choices are correct

Biology & Microbiology