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
  • l 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 so 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. autotrophic, 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. diffusion
  • 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 OH
  • B. the number of OH- is greater than the number of H+
  • C. the number of H+ is equal to the number of OH
  • D. the number of H+ is greater than the number of OH
  • E. none of the above.

20. Glucose breakdown leads to _________.

  • A. DNA replication
  • B. ATP buildup
  • C. RNA synthesis
  • D. ATP degradation
  • E. ADP breakdown

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