exam3+summer94

exam3+summer94 - 1. A cell in anaphase of mitosis contains...

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Unformatted text preview: 1. A cell in anaphase of mitosis contains number of chromosomes and amount of DNA compared to the same cell when it was in Gap 1. A. half the, half the B . the same, half the C. the same, the same D. the same, twice the E. twice the, twice the 2. Using the table at the back of this exam translate the following sequence of mRNA. Be sure to pay attention to the start and stop codons and the directionality of the molecule 3 ' .AAUAUGGGGGUAAAA 5' . methionine - glycine - valine . methionine- glycine - valine - lysine . lysine - methionine — glycine - valine . asparagine - methionine - glycine - valine — lysine none of the above monw> 3. Procaryotic gene regulation generally involves inhibiting or enhancing which of the following processes? ‘ . transcription . translation . replication . carbohydrate synthesis editing of the mRNA moow> 4. A trait which exhibited continuous variation in a population (one in which there are not discrete phenotypes)lwou1d mostly likely be controlled by? . multiple alleles . epistatic genes . lethal alleles . a single gene multiple genes _munw> 5. In the DNA molecule shown below the 5' ends of the backbones are located at positions: A. IandII B.IandIII I C.IandIV ' D. IIandIH E. HandIV Page: 1 2| 6. A diploid cell containing 28 chromosomes would contain chromosomes during anaphase I. - A. 7 B . 14 C. 28 D. 35 E. 52 7. The editing of eucaryotic mRN A would be considered part of gene regulation at which of the following levels? A. transcriptional B; post-transcriptional C. translational D. post-translational E. replicational 8. During replication DNA polymerase will build the new backbone from its ~ and __ to the template. A. 5' end to its 3' end, parallel B. 5' end to its 3' end, anti-parallel C. 3' end to its 5' end, parallel D. 3' end to its 5' end, anti-parallel E. none of the above 9. The basic model of procaryotic gene regulation was first elucidated by: This is the exam break question the answer is Jacob and Monod, "a" A. Jacob and Monod B. Calvin and Benson C. Watson and Crick D. Hershey and Chase E. Simon and Garfunkel 10. A parental cell containing 12 chromosomes undergoing mitosis will produce daughter cells containing chromosomes. A. 6 B. 12 C. 18 D. 24 E. 36 11. In the following cross R/r Y/y x R/r Y/y what is the probability of producing a offspring with the E. 0 this offspring can not be produced by these parents Page: 2 2L 12. l3. 14. 15. 16. 17. In the following cross G/g x G/g what is the expected ratio of offspring with the dominant and recessive phenotypes? Assume complete dominance in this question. A. all dominant B. all recessive C. l dominant: 1 recessive D. 2 dominant: 1 recessive E. 3 dominant: l recessive A cell containing 4 setsof chromosmes would be: A. haploid B. monoploid C . diploid D. triploid E. tetraploid Parents, who both have brown eyes, have 6 children with blue eyes what is the probability of their next child having blue eyes? ' A. 1/64 B . 1/ 16 C . 1/8 D. 1/4 E. 1/2 An operon consists of which of the following? . a promoter 4 . an operator . several structural genes . aregulator more than one of the above moow> Besides the codon UUA how many additional codons willalso code for the amino acid Leucine? (Hint see table of genetic code at the end of this exam.) . In the cross R/r T/t x R/R T/t what is the probability of producing an offspring that has the dominant phenotype for the "R" gene and the recessive phenotype for the "T" gene? Page: 3 24. 25. 26. 27. 28. 29. During translation: A. The sequence of nucleotides in mRNA is used to determine the sequence of amino acids in the . protein being produced. The sequence of nucleotides in rRNA is used to determine the sequence of amino acids in the protein being produced. The sequence of nucelotides in DNA is used to determine the sequence of amino acids in the protein being produced. Thednucleotides in mRNA are chemically converted into the amino acids in the protein being pro uced. Thednucleotides in DNA are chemically converted into the. amino acids in the protein being pro uced. B. C. D. E. Hemophila is caused by an X—linked recessive. If a man without hemophila and ‘awoman who has hemophila have children what are the expected results? A. all the daughters will have hemophila B . all the sons will have hemophila C . half the sons and half the daughters will have hemophila D. all the sons and half the daughters will have hemophila E. none of the children will have hemophila One of the daughter cells, in anaphase 11, resulting from the meiotic division of a diploid cell originally containing 44 chromosomes would contain chromosomes and homologous pairs. A. 22, O B. 22, 11 C. 44, 0 D. 44, 22 E. 44, 44 o Ribosomes are composed of proteins and: A. DNA B . mRNA C. rRNA D. tRNA B. DNA polymerase Interphase consists of: A. Gap 1 B. Gap 1, S C. Gap 1, S, Gap 2 D. Gap 1, S, Gap 2, karyokinesis E. Gap 1, S, Gap 2, karyokinesis, cytokinesis How many different types of gametes can an individual with the following genotype A/a B/b produce? A. 1 F190?” Ddth Page: 5 18. In a negatively regulated inducible procaryotic gene in the absence of the inducer molecule, which of the following would be correct? A. the repressor will not be bound to the operator B. the structural genes will be expressed C. RNA polymerase will not be able to bind to the promoter D. the structural genes will be transcribed E. the regulator gene will not produce a repressor molecule 19. A homologous pair ofchromosomesconsists of: . two sister chromatids . two kinetochores . two chromosomes containing the same genes . two ten-ads more than one of the above is correct 20. replicated chromosome consists of: . two kinetochores . two molecules of DNA . two tetrads . one chromatid more than one of the above is correct munw>> meow» 21. The genotype of any one of Mendel's true breeding plants was: A. homozygous B. heterozygous‘ C. hemizygous D. dominant E. recessive 22. An individual with the following genotype ABC/abc could produce which ofthe following types of gametes? Note the linkage and assume no crossing-over. - A. abc B. Abc C. ABc D. aBC E. all of the above 23. In the following cross F/f x f/f what is the expected genotypic ratio in the offspring? A. all F/F B. all f/f C. 3 F/F : l f/f D. 1F/f: 1 f/f E. 2 F/f : 1 f/f Page: 4 30. 31. 32. 33. 34. 35. During replication the enzyme involved in unwinding the DNA helix and separating the backbones is known as: A. DNA gyrase B . Helicase C. DNA ligase D. DNA polymerase E. RNA primase During the formation of RNA along a DNA template which of thefollowing nucleotides pair with (or is complementary to) adenine? A. cytosine B. guanine C. thymine D. uracil E. adenine A diploid cell containing a total of 48 chromosomes would contain anaphase of mitosis. A. 12 B . 24 C . 48 D. 96 E. 192 chromosomes during In eucaryotes thevinitiation of translation begins with which of the following? A. The large ribosomal subunit binding to the rRNA. B. The large ribosomal subunit binding to the 5‘ end of the DNA. C. The small ribosomal subunit binding to the first AUG in the rRNA. D. The small ribosomal subunit binding to the cap at the 5' end of the DNA. E. The small ribosomal‘subunit binding to the cap at the 5‘ end of the mRNA. Compared to the parental cell, when it was in Gap 2, each daughter cell resulting from meiosis would contain number of chromosomes and amount of DNA. A. half the, one quarter the B . one quarter the, half the C. half the, the same D. the same, half the E. the same, the same An individual with the following genotype Blb D/d GIG H/h Q/q J/j could not produce which of the following types of gametes? A. b/d/G/h/q/j B . b/d/g/h/q/j C. B/D/G/h/q/j D. B/D/G/H/Q/J . E. more than one of the above Page: 6 42. A man with type AB blood and a woman with type 0 blood could have children with all of the following blood types except: A. A B. B C . AB D. they could have children with all of the above blood types E. they could have children with none of the above blood types 43. DurinlgI replication a molecule of DNA is going to be used as a template for the production of: A. D A B . RNA C . protein D. carbohydrates E. nucleotides 44. One of the daughter cells, in interkinesis, resulting from a diploid cell containing 36 chromosomes ixidgrgging meiosis would contain chromosomes and homologous pairs. B. 18, 0 C. 18, 9 D. 36, 0 E. 36, 18 45. During mitosis the poles of the spindle apparatus are organized around the: A. centrioles . ‘ B . centromeres C. kinetochores D. chromatids E. tetrads 46. Based on the semi-conservative model of DNA replication which of the following statements is correct? The individual backbones of DNA are broken apart into many pieces during replication. At the end of replication the backbones of the original DNA molecule come back together. Only one DNA backbone will serve as a template for the fomiation of the new backbones. Each of the final DNA molecules produced consist of one of the original backbones plus one new backbone. none of the above are correct 3. 47 ucleic acids are polymers composed of many bonded together. amino acids' monosaccharides C proteins D nucleotides phosphate groups B: c. D. E . N A. B. E Page: 8 48. A ribosome actively engaged in protein synthesis would contain or be associated with which of the . following molecules? A. DNA, mRNA, proteins B. DNA, mRNA, rRNA C. mRNA, rRNA, tRNA D. mRNA, rRNA, tRNA, proteins E. DNA, mRNA, rRNA, tRNA, proteins 49. In eucaryotic organisms the initial mRNA transcript must be edited prior to it being translated. During this editing the are left in the mRNA to be translated. A. introns B. exons C. anti-codons D. tRNAs E. amino acids 50. Dating protein synthesis is capable of recognizing mRNA codons and specific amino acids. A. tRNA B. mRNA C. rRNA D. DNA E. more than one of the above His wish for life granted. the Visible Man takes his first steps into the real world —— not suspecting that most people. upon seeing him. would either faint er throw up. Page: 9 207 BIOL 1201 exam #3 Answer Key M m N M D m D m m 1m In 1h In M) 1® m) U) m) w) m) 2” w) m) M) w) m) N) m) w) m) 3” w) M) M) w) w) M) 3% m) Visible Man mwUUW>mUannnUw>U>>mnowmmomm>W>wanm>>m 40) 41) 42) 43) 44) 45) 46) 47) 48) 49) 50) >wUUU>w>OOU ...
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exam3+summer94 - 1. A cell in anaphase of mitosis contains...

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