MCDB1A2005midterm2

MCDB1A2005midterm2 - Name _ TA _ MCDB 1A Midterm...

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Name _________________________ TA ________________________ MCDB 1A Midterm Examination II November 9, 2005 Scantron Instructions: 1. Use a #2 pencil to complete the form. 2. Write your name and fill in the appropriate bubbles. 3. Write your perm. number in the ID number box and fill in the bubbles. 4. Write the color of your test in the space underneath the ID box. 5. Fill in the entire rectangle of the answer you choose. If you erase, erase completely READ ALL QUESTIONS THOROUGHLY, IN ALL CASES, PICK THE BEST ANSWER 33 QUESTIONS 3 POINTS EACH Test color 1 Point Bonus question (#35) Up to 3 points 1. Which one of the following pairs is mis-matched? A. absence of an important lysosomal enzyme- Tay-Sachs disease B. karyotype- a display of all of the chromosomes of a eukaryotic organism C. penicillin - a drug that selectively kills bacterial cells D. Down's syndrome- extra copy of chromosome 21 E. chromoplast- a plant organelle that carries out photosynthesis 2. The uncondensed length of DNA found in a midsized human chromosome is _______, and consists of approximately _____ genes. A. 5 cm, 1,600 B. 2 miles, 30,000 C. 5 μmeters, 30,000 D. 5 cm, 30,000 E. 5 μmeters, 1,600 3. Which statement about the nuclear envelope is true? A. it contains pores for the passage of large molecules B. it is composed of two membranes C. it contains the nuclear lamina on the inner surface D. A and B E. A, B, and C 4. Which organelles are found in plant cells but not in animal cells? A. plastids B. nucleolus C. mitochondria D. ribosomes E. none of the above MCDB 1A MT II, Blue Version: 1 Page: 1
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5. Which of the following statements regarding transport of molecules across membranes is true? A. charged molecules such as amino acids and sugars are transported by passive diffusion. B. uniports transport a single substance in opposite directions. C. airports transport substances through aqueous holes in the membranes. D. transport by passive diffusion requires ATP. E. antiports transport two different substances in opposite directions 6. Which of the following is found in bacterial cells? A. mitochondria B. lysosomes C. nuclear membrane D. ribosomes E. A and D 7. Connections between two cells that permit passage of molecules from one cell to the other are called A. intersections B. desmosomes C. gap junctions D. loose junctions E. tight junctions 8. The number of chromosomes is reduced to half during A. Meiosis I B. meiosis II C. Anaphase of mitosis D. DNA replication during S E. B and C 9. The second meiotic division of meiosis is important because
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MCDB1A2005midterm2 - Name _ TA _ MCDB 1A Midterm...

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