Question 1 In eukaryotes, transcription occurs in the A. mit

Question 1 In eukaryotes, transcription occurs in the A. mitochondria. B. nucleus. C. … Show more Question 1 In eukaryotes, transcription occurs in the A. mitochondria. B. nucleus. C. ribosome. D. cell membrane. E. cytoplasm. Question 2 The fact that the two strands composing a DNA molecule are called antiparallel has to do with the orientation of the A. sugar molecules. B. phosphate molecules. C. sulfide bonds. D. hydrogen bonds. E. bases. Question 3 We refer to the DNA code as being redundant or repetitive. This means that A. some codons code for the same amino acid. B. one codon codes for one amino acid. C. each triplet codes for one amino acid. D. a single triplet may code for more than one amino acid. E. each triplet codes for a different amino acid. Question 4 Base pairing A. occurs between identical bases. B. explains the X-ray results from Rosalind Franklin. C. occurs between A and C. D. takes place between sugars and phosphates on the two strands in a helix. E. requires hydrogen bonds. Question 5 The two subunits of the ribosome join during A. promotion of transcription. B. elongation. C. initiation of translation. D. termination of translation. E. termination of transcription. Question 6 The bases are bonded to what part of the backbone of the DNA molecule? A. the 5’ carbon atom of the sugar molecule. B. the 2’ carbon atom of the sugar molecule. C. the 3’ carbon atom of the sugar molecule. D. the 4’ carbon atom of the sugar molecule. E. the 1’ carbon atom of the sugar molecule. Question 7 Hershey and Chase performed an experiment in which they used radioactive isotopes to phosphorus and sulfur to label different components of bacterial viruses. Their results clearly showed that A. the viruses did not contain DNA. B. DNA was entering into the infected bacteria. C. the viruses did not contain protein. D. genetic material normally contains radioactive isotopes. E. protein was entering into the infected bacteria. Question 8 In recombinant DNA technology, enzymes used to precisely cut DNA are called A. DNA polymerases. B. DNA ligases. C. vectors. D. RNA polymerases. E. restriction enzymes. Question 9 In DNA, cytosine bonds to guanine. In RNA, cytosine bonds to A. adenine. B. cytosine. C. thymine. D. guanine. E. uracil. Question 10 When looking at a table depicting the genetic code, the base sequences signify A. rRNA. B. mRNA. C. mtDNA. D. tRNA. E. DNA. Question 11 What enzyme is used to “glue” together the ends of cut pieces of DNA? A. DNA ligase B. restriction enzymes C. protease D. DNA polymerase E. RNA polymerase Question 12 What form of RNA carries instructions from the nucleus to the ribosome? A. mRNA B. bRNA C. rRNA D. sRNA E. tRNA Question 13 A component of bacteria that are often used in biotechnology are A. polypeptides. B. operons. C. plasmids. D. introns. E. exons. Question 14 Normal human body cells contain how many chromosomes? A. 42 B. 23 C. 22 D. 44 E. 46 5 points Question 15 DNA replication A. is constantly happening in a cell. B. does not require proteins. C. occurs in G1 of interphase. D. takes place in the nucleus of the cell. E. occurs in the cytoplasm of the cell. Question 16 DNA replication of a single DNA molecule is referred to as semiconservative because A. each of the two DNA molecules will consist of one parental strand and one newly synthesized strand. B. of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA. C. one DNA strand is replicated continuously, while the other must be replicated discontinuously. D. it results in two nonidentical DNA molecules. E. all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA. Question 17 A package of histones with DNA wrapped around them forms spherical structures called A. ribosomes. B. nucleosomes. C. lysosomes. D. nucleoli. E. chromatin. Question 18 The anticodon of the tRNA molecule base pairs with A. rRNA. B. DNA. C. polypeptides. D. mRNA. E. amino acids. Question 19 What step in DNA replication precedes the pairing of complementary bases? A. polymerization of DNA. B. formation of the histone core. C. mitotic division. D. joining of the two strands. E. separation of the two strands. Question 20 The most important experimental results that suggested to Watson and Crick that DNA was in the form of a helix was A. the findings of Chargaff that DNA always had equal amounts of A and T and equal amounts of G and C. B. X-ray data from Rosalind Franklin. C. understanding DNA replication. D. the discovery that DNA is wound around histone proteins. E. Griffith’s results with transformation. • Show less

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