Genes are made by- (A) Histones (B) Lipoproteins (C) Hydrocarbons (D) Polynucleotides

Which enzyme links amino acids to the 3’ OH group of an RNA? (a) ribozyme    (b) peptidyl transferase   (c) DNA polymerase I     (d) RNA polymerase II                  (e) amino-acyl tRNA synthetase

(A) Nonsense mutations (i) result in addition of one or more nucleotides (B) Transversion mutations (ii) result in no amino acid change (C) Transition mutations (iii) result in a change in amino acid (iv) replace one pyrimidine base with the other or one purine base with the other (D) Deletion mutations (v) replace a pyrimidine with a purine or the other way around (vi) create stop codon (E) Silent mutations (F) Insertion mutations (vii) result in loss of one or more nucleotides (G) Missense mutations

Which component is not directly involved in translation?(A) GTP(B) DNA(C) tRNA(D) ribosomes

The process shown here is a) Splicing b) Replication c) Transcription d) Translation Laten The process shown here is a) Replication b) Splicing c) Translation Adenine (A) Thymine (T) Cytosine (C) Guanine (G) Uracil (U) d) Transcription or ↓

The _______________ catalyzes the excision of introns from pre-mRNA. (a) ribosome (b) spliceosome (c) RNA polymerase enzyme (d) aminoacyl–tRNA synthetase enzyme (e) reverse transcriptase enzyme

Order+the+following+of+protein+sentesis+sequence+from+earliest:                         (a)tRNA molecule bring specific amino acids to he mRNA molecule.                     b)mRNA nucleotides join with exposed DNA bases and form a molecule of mRNA.(c)The two stands of a DNA molecule separate.                                                   (d)Peptide bonds form between the amino acids.                                                               (e)the mRNA molecule leave the nucleus.                                                                         (f) a ribosome attached to the mRNA molecule.

Suppose you mix the following components of protein synthesis in a test tube: amino acids from a rabbit, ribosomes from a dog, tRNAs from a mouse, mRNA from a chimpanzee, and necessary enzymes plus an energy source from a giraffe. If protein synthesis occurs, which animal’s protein will be made? (a) rabbit (b) dog (c) mouse (d) chimpanzee (e) giraffe

WVA1 is a protein that is secreted by epithelial tissues of mice. Which of the following is not predicted to be found in the DNA sequence of the gene that codes for WVA1? a) A DNA sequence corresponding to an exon. Ob) 5'-AATAAA-3! c) 5'-UUGACA-3'. d) A DNA sequence corresponding to a signal peptide of the amino acids chain. e) A DNA sequence corresponding to the 5'-UTR of the mRNA.

Locate as accurately as possible the listed items that are shown on the following figure. Some items are not shown. (a) 5′ end of DNA template strand; (b) 3′ end of mRNA; (c) ribosome; (d) promoter; (e) codon; (f) an amino acid; (g) DNA polymerase; (h) 5′ UTR; (i) centromere; (j) intron; (k) anticodon; (l) N terminus; (m) 5′ end of charged tRNA; (n) RNA polymerase; (o) 3′ end of uncharged tRNA; (p) a nucleotide; (q) mRNA cap; (r) peptide bond; (s) P site; (t) aminoacyl-tRNA synthetase; (u) hydrogen bond; (v) exon; (w) 5′ AUG 3′; (x) potential wobble interaction.