101Test3DeSaixNov6-2007key - Biology 101 Test III DeSaix 1...

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Biology 101 – Test III – DeSaix November 6, 2007 Name________________________ Print your name, last name first, legibly on your answer sheet. Fill in Bubbles for your name and PID. Each answer is worth 2 points. Always choose one best answer and use only number 2 pencils to fill in your answers. Be sure to sign the pledge on your answer sheet. The last question will be used only if another question has to be deleted. Turn in your scantron. Keep your test paper with answers. _1__ 1. Which of the following is false regarding DNA and RNA molecules? 1) DNA is an example of a polymer, but RNA is not 2) DNA is usually double-stranded; RNA is usually single-stranded 3) nucleotides in DNA contain a different sugar from the nucleotides in RNA 4) DNA contains the bases A,C,G and T; RNA contains the bases A, C, G and U 5) all of the above are true statements _1__ 2. A closely-related group of genes that regulate protein synthesis is 1) operon 2) synthetase 3) autosome 4) chromosome 5) exon _2__3. The region of mRNA carrying the genetic information which will be translated into polypeptides is called the 1) intron 2) exon 3) codon 4) viron 5) transcription factor _3__4. Instructions for the placement of one amino acid in the protein chain are given by nucleotide bases in sets of: 1) 1 2) 2 3) 3 4) 4 5) 5 _2__5. Transcription is the process whereby: 1) amino acids and genetic information produce protein 2) molecules of mRNA are formed 3) Ribosomes manufacture RNA 4) mutational differences between species are counted 5) genes are read into protein _2__6. In normal hemoglobin, the sixth amino acid is glutamic acid, but in sickle-cell hemoglobin, it is valine. What did this demonstrate to geneticists? 1) a protein’s role is to specify the order of nucleotides in a gene 2) a gene specifies the order of amino acids in a polypeptide chain 3) the substitution of one amino acid for another is a chance event 4) the substitution of one amino acid for another is unimportant 5) all of the above _3__7. The manufacture of DNA from DNA is known as: 1) genetic transformation 2) genetic transcription 3) genetic replication 4) genetic translation 5) reverse transcription _4__8. Which one of the following is not required for protein synthesis? 1) mRNA 2) ribosome 3) tRNA 4) endoplasmic reticulum 5) amino acids _1__9. In genetic engineering a vector is a (an): 1) agent used for transferring DNA from source to host 2) particular segment of foreign DNA targeted for transfer 3) region of the host’s chromosome at which foreign DNA will be inserted 4) organism to which source DNA is transferred (e.g., E. coli) 5) restriction endonuclease _3_ 10. What property allows bacteria to use the information in a human gene to make a protein that is identical to the protein made by human cells? 1) Bacteria and humans have mitochondria 2) the bases in bacterial DNA differ slightly from human bases 3) the genetic code is the same in bacteria and human cells 4) Bacterial mRNA uses the base U instead of T 5) Natural selection favors rapid translation in bacteria
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This note was uploaded on 11/05/2011 for the course BIOL 101 taught by Professor Hogan during the Fall '08 term at UNC.

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101Test3DeSaixNov6-2007key - Biology 101 Test III DeSaix 1...

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