FREE AND STUDY GAMES ABOUT BSC1010H EXAM

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FREE AND STUDY GAMES ABOUT BSC1010H EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -126 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Genetic information of eukaryotic cells is transferred from the nucleus to the cytoplasm in the form of _____.

Answer:

RNA

Question 2: What mRNA codon would be made from the DNA triplet CGT?

Answer:

GCA Question 3: Cells are able to distinguish proteins destined for secretion or for segregation to specific intracellular compartments from those that will remain in the cytoplasm because _____.

Answer:

some proteins, as they begin to be synthesized, contain a signal region that causes the ribosome with its growing polypeptide to attach to the ER and translocate the polypeptide into the lumen (space) of the ER.

Question 4: Who is credited with explaining the structure of the DNA double helix?

Answer:

Watson and Crick Question 5: Put the following DNA-containing entities in order according to the amount of DNA found in their genomes

Answer:

virus, bacteria, eukaryote

Question 6: During translation in a eukaryotic cell _____.

Answer:

polypeptides are synthesized at ribosomes, according to instructions carried out by mRNA Question 7: The incorporation of an incorrect base into the DNA during replication _____.

Answer:

can be repaired by the mismatch repair system Question 8: For any given gene, what ultimately determines which DNA strand serves as the template strand?

Answer:

the base sequence of the gene's promoter

Question 9: Transcription factors are found in ______.

Answer:

archaea and eukaryotes Question 10: At one point, as a cell carried out its day-to-day activities, the nucleotides GAT were paired with the nucleotides CUA. This pairing occurred _____.

Answer:

during transcription Question 11: The two strands of a DNA double helix are antiparallel. This mean that _____.

Answer:

one strand runs in the 5' to 3' direction, and the other runs in the 3' to 5' direction

Question 12: What is the process called that converts the genetic information stored in DNA to an RNA copy?

Answer:

transcription

Question 13: What is meant by translocation?

Answer:

The ribosome slides one codon down the mRNA

Question 14: The role of DNA polymerases in DNA replication is _____.

Answer:

attach free nucleotides to the new DNA strand Question 15: True or false. A tRNA with an anticodon complementary to the stop codon catalyzes the reaction by which translation is terminated.

Answer:

False

Question 16: Where does translation take place?

Answer:

Ribosome Question 17: Which of the following catalyzes the linkage between ribonucleotides to form RNA during gene expression?

Answer:

RNA polymerase Question 18: During translation, amino acid chain elongation occurs until _____.

Answer:

the ribosome encounters a "stop" codon Question 19: What is the major difference between bacterial chromosomes and eukaryotic chromosomes?

Answer:

Bacteria have a single circular chromosome whereas eukaryotes have several linear chromosomes

Question 20: Which set of enzymes is involved in nucleotide excision repair?

Answer:

nuclease, DNA polymerase, and ligase Question 21: The first amino acid inserted into a new polypeptide chain in eukaryotic cells is usually _____.

Answer:

methionine Question 22: Which of the following statements correctly describes mRNA processing?

Answer:

Introns are cut out of the primary transcript, and the resulting exons are spliced together.

Question 23: The function of tRNA during protein synthesis is to _____.

Answer:

deliver amino acids to their proper site during protein synthesis Question 24: The tRNA anticodon, GAC, is complementary to the mRNA codon with the sequence _____.

Answer:

CUG Question 25: The overall error rate in the completed DNA molecule is approximately _____.

Answer:

• error per 10, 000, 000, 000 nucleotides

Question 26: The unwinding of DNA at the replication fork causes twisting and strain in the DNA ahead of the fork, which is relieved by an enzyme called _____.

Answer:

topoisomerase

Question 27: RNA processing converts the RNA transcript into _____.

Answer:

mRNA