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Sample Test 3

Sample Test 3 - Biology 101 DeSaix 1 April 2010 Name Print...

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Biology 101 – DeSaix 1 April 2010 Name _______________ Print your name, last name first, and your PID number legibly on your answer sheet. Bubble in both below. 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 answer sheet in alphabetical order at the front of the room. Keep your test paper with answers to check against the key so that you will know what you have missed. The key will be posted after the test. Choose the one most appropriate answer for the next 5 questions. 1) control over enzyme activity 2) transcript processing 3) post-translational control 4) transcriptional control 5) transport control __4__ 1. influences the amount and kinds of mRNA copied from structural genes. __2__ 2. snipping out transcript regions; chemical modification of transcript before it arrives at ribosome control. __5__ 3. nuclear envelope selectively regulates passage of transcripts. __1__ 4. for example, the interior environmental pH determines whether a protein can act as a cell catalyst. __5_ 5. Which of these is the smallest unit upon which natural selection directly acts? 1) a species' gene frequency 2) a population's gene frequency 3) an individual's genome 4) an individual's genotype 5) an individual's phenotype __1__ 6. . Using a restriction enzyme, you cut a plasmid into four pieces (A-D) with the following sizes. You run the pieces on a gel; what does the gel look like? A= 1287 nt B= 237 nt C= 980 nt D= 2970 nt 1 2 3 4 5 __2__ 7. How is the pedigree of an individual generally constructed? 1) by sequencing the genome of the individual. 2) by interviewing the individual regarding the sex and physical traits of his or her family members. 3) by sequencing the genes of the individual’s parents. 4) by analyzing the genetic fingerprint of the individual and of all of his or her family members. __3__ 8. Which of the following is an application of recombinant DNA technology? 1) animal cloning 2) in vitro fertilization 3) rice plants that produce rice with Beta-carotene, a substance found in carrots 4) using bacteria to control the insect infestation of food crops. __1__ 9. In certain species crosses, such as that between the horse and the donkey, offspring are produced, but they are usually sterile. The most common explanation of this result is that: 1) the chromosomes of the two species differ too much to pair properly in meiosis. 2) the two species differ too much in behavior to be able to mate successfully. 3) embryological development in the two species are incompatible. 4) hormonal differences between the two species prevent proper development of the sex organs or gametes. 5) antibody formation in the offspring produced sterility.
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