RNA polymerase movies along the template strand of DNA in the direction and adds
ID: 91004 • Letter: R
Question
RNA polymerase movies along the template strand of DNA in the direction and adds nucleotides to the end of the growing transcript. A) 3' to 5'; 5" B) 3' to 5'; 3" C) 5' to 3'; 5" D) 5' to 3'; 3" What are the coding segments of a stretch of eukaryotic DNA called? A) intones B) exon C) condos D) replicas E) transposes During splicing, which molecular component of the splice some catalyzes the excision reaction? A) RNA B) DNA C) protein D) lipid E) sugar A eukaryotic cell lacking telomerase would A) have a high probability of becoming cancerous. B) product Okazaki fragments. C) be unable to repair thymine dimmers D) undergo a reduction is chromosome length E) be highly semitone to sunlight. An anticodon is a part on A) DNA B) tRNA C) mRNA D) a ribosome E) an activating enzyme The function of poly rename is; A) polymerizes ribosome synthesis B) transport of rib come C) increase the efficacy of protein synthesis. D) to associate mRNA, rRNA, and protein E) so remove intones.Explanation / Answer
33. RNA polymerase moves in the direction of 3' to 5' along the DNA strand, thus producing an RNA strand of 5' -> 3' in nature. This movement is due to the antiparallel nature of the DNA strands that acts as the template.
Nucleotides are added to the 3' ends of the growing strand
Answer: B
34. Coding portions of the eukaryotic genome are called exons.
Answer: B
35. Splicing reaction of pre-mRNA is carried out by a ribonucleoprotein complex, called the spliceosome. This enzymatic machinery is composed of small nuclear RNA (snRNA) and many protein factors.The catalytic function of splicing is carried out be the RNA.
Answer: A
36. The eukaryotic DNA contains a special repeat DNA sequence in tandem, at the end of each nucleotide chain, known as telomere. The telomere has a protective function mainly by preventing DNA from end-to-end fusion and other damages. The enzyme responsible for adding telomere repeat sequences to the DNA are called telomerase. A cell lacking telomerase is likely to become shorter in length, as it divides..
Answer: D
37. Polyribosomes are a cluster of ribosomes attached to the mRNA strand at one time, and translating different nucleotide segments of the mRNA. The polyribosome increases the efficiency of protein synthesis by involving lot of other proteins to help the growing polypeptide properly fold.
Answer: C
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