BIO 140 Exam 2 KEY - Biology 140, Spring 2008 Exam 2 (62...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Biology 140, Spring 2008 KEY Exam 2 (62 questions) Record your answers on the scantron form provided (use a #2 pencil) 1. It is advantageous for cells to be small because: * A. a small cell size prevents a cell from weighing too much. * B. a small cell size occupies less space in nature where space is limited. C. a small cell has a small volume relative to surface area, thereby increasing efficient transport. * D. a small cell has a small surface area relative to volume, thereby facilitating ion balance. * E. a small cell is better able to conserve energy than a larger cell. 2. Use the figure below to answer the following question. Which of the following statements about the cells in the accompanying figure is true? * A. Figure B cell has a greater surface area than the combined surface area of Figure A cells. * B. Figure B cell has a much greater volume than the combined volume of Figure A cells. * C. Figure B cell has a smaller volume than the combined volume of Figure A cells. * D. Figure B cell has a greater surface area to volume ratio than any Figure A cells. E. Figure B cell has a smaller surface area to volume ratio than any Figure A cells. 2. Electron microscopes have a much higher resolution than either the human eye or any light microscope because: * A. of their higher magnification. * B. the lenses used are of much higher quality. C. of the very short (nanometer) wavelengths of electrons. * D. the images are viewed on screens, rather than directly using an eyepiece or ocular lens. * E. all of the above. 3. Cell fractionation is used to isolate organelles. The main instrument used in cell fractionation is: * A. the electron microscope. B. the light microscope. C. a centrifuge. D. a water bath. E. none of the above. 4. Prokaryotes are: A. single celled organisms with no organelles. B. single celled organisms with membraneous organelles and no nuclear membrane. C. single celled organisms with no membraneous organelles and no nuclear membrane D. single celled organisms that are obligate parasites. E. single celled organisms that no longer exist.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 5. Which of the following is (are) found in prokaryotic cells? A. Mitochondria B. Chloroplasts C. Nuclear membrane D. Ribosomes E. Endoplasmic reticulum 6. You would not expect to find RNA in which of the following structures? A. Nucleus B. Mitochondrion C. Vacuole D. Ribosome E. Prokaryotic cell 7. Which is TRUE about the Archaea: A. they are more closely related to the Bacteria but live in extreme environments B. they lack a nuclear membrane around their DNA C. they possess membraneous organelles D. they are single celled fossils E. they are eukaryotes. 8. Nuclear pores are “gates” that control what goes in and out of the: A. Nucleus B. Cell wall C. Golgi apparatus D. Mitochondrion. E. Chloroplast. 9. The roles of biological membranes in eukaryotic cells include which of the functions listed below?
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/24/2008 for the course BIOLOGY 140 taught by Professor Mullin during the Spring '08 term at University of Tennessee.

Page1 / 8

BIO 140 Exam 2 KEY - Biology 140, Spring 2008 Exam 2 (62...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online