Bio Answers

Lecture Quiz- 10/9/2010 Answer Key 1. The scientific study of life is called: A. biology B. ecology C. anatomy D. biochemistry E. limnology 2. Human beings are _______________ because they are composed of many cell types. A. unicellular B. acellular C. asymmetrical D. autotrophic E. multicellular 3. A/an _______ is composed of a group of similar cells that perform a particular function. A. organ B. system C. organism D. tissue E. population 4. Choose the CORRECT order (1-5) of increasing complexity/organization. A. 1) tissues, (2) organ systems, (3) cells, (4) organs, (5) organism B. (1) cells, (2) organ systems, (3) tissues, (4) organs, (5) organism C. (1) tissues, (2) organs, (3) organ systems, (4) cells, (5) organism D. (1) cells, (2) tissues, (3) organs, (4) organ systems, (5) organism 5. In an experiment designed to test the effect of temperature on goldfish respiration, the temperatures that were changed represent the ______ variable. A. control B. responding C. experimental D. correlative E. placebo 6. Which of the following is considered a basic tissue type?A. epithelial B. connective C. muscle D. nervous E. All of the above 7. ____________ exist as small biconcave blood cells that lack a nucleus when they are mature and carry oxygen throughout the body. A. Neutrophils B. Erythrocytes C. Platelets D. Monocytes E. Lymphocytes 8. ___________ receives sensory input, integrates data, and conducts impulses. A. Epithelial tissue B. Connective tissue C. Muscular tissue D. Nervous tissue E. Vascular tissue 9. The phospholipid bilayer that surrounds/maintains the integrity of a cell is called a: A. plasma membrane B.Sanger enclosure C. hydrophobic membrane D. dialysis membrane E. mosaic membrane 10. _____________ are small membranous structures that occur within the cell and have various functions. A. Matrices B. Organelles C. Cytoskeleton D. Golgi bodies E. Ribosomes 11. In the fluid-mosaic model of the plasma membrane, the phospholipid molecules are oriented s o that the _____________ heads are facing the outside environment and the ________________ tails are facing the interior of the membrane. A. hydrophobic, hydrophilic B. hydrophilic, hydrophobic C. utotrophic, heterotrophic D. heterotrophic, autotrophic E. ectothermic, endothermic 12. The diffusion of water across a semi-permeable membrane is called: A. denaturation B. osmosis C. dispersion D. dissociation E. reconstitution 13. Choose the CORRECT statement about solute concentrations or particles inside and outside the cell. A. In a hypertonic solution, there are more particles inside the cell. B. In a hypotonic solution, there are more particles outside the cell. C. In an isotonic solution the number of particles is equal. D.Lysis usually occurs when a cell is exposed to hypertonic solutions. E. Lysis occurs when a cell is exposed to an isotonic solution 14. The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as ______. A. diffusio n B. facilitated transport C. active transport D. osmosis E. None of the choices are correct. 15. The _______ is a stack of slightly curved saccules that are important in packaging and secretion. A. mitochondria B. vacuoles C. Golgi apparatus D. lysosomes E. Endoplasmic reticulum 16.Molecular biologists have determined that during protein synthesis that the messenger RNA exits the nucleus through small openings in the nuclear envelope. These openings are known as ____. A. nuclear pores B. nucleoli C. Golgi bodies D. lysosomes E. peroxisomes 17. Glycolysis occurs within the ___________ and the citric acid cycle and electron transport chain occur within the _____________. A. mitochondrion, cytoplasm B. mitochondrion, plasma membrane C. cytoplasm, mitochondrion D. cytoplasm, lysosome E. plasma membrane, cytoplasm 18.The formation of ______ bonds involves the transfer of electrons from one atom to another nearby atom. A. covalent B. ionic C. hydrogen D. polar E. all of the above 19. In an acidic solution: A. the number of H+ is less than the number of OHB. the number of OH- is greater than the number of H+ C. the number of H+ is equal to the number of OHD. the number of H+ is greater than the number of OHE. none of the above 20. Glucose breakdown leads to _________. A. DNA replication B. ATP buildup C. RNA synthesis D. ATP degradation E. ADP breakdown