Biology Test 2

1.Light microscopes produce images of only dead organisms.

a.True
b.False

2.In which microscope does light pass through glass lenses to produce an image?

A. Light microscope
B. Transmission microscope
C. Electron microscope
D. Scanning microscope

3.Which microscope produces 3 dimensional images of the surface of a cell?

A. Scanning microscope
B. Electron microscope
C. Transmission microscope
D. Light microscope

4.The cell wall of a prokaryotic cell is

A. Rigid
B. Outside the plasma membrane
C. Protects the cell from the environment
D. Helps maintain the shape of the cell
E. All the above

5._______________ are short projections on the surface of the prokaryotic cell which serve in adherence.

A. Cilia
B. Flagella
C. Pili
D. None of the above

6.All activities of the eukaryotic cell are controlled in the

A. Golgi apparatus
B. Endoplasmic reticulum
C. Mitochondria
D. Nucleus

7.The nuclear envelope of the cell

A. Has a double membrane
B. Is perforated with pores
C. Controls what material flows in and out of the nucleus
D. All the above

8.Ribosomes are produced in the nucleolus.

a.True
b.False

9.The “suicide capsules” of the cell are the

A. Centrioles
B. Lysosomes
C. Ribosomes
D. Contractile vacuole

10.Cellular respiration occurs in the

A. Smooth ER
B. Rough ER
C. Centrioles
D. Mitochondria

11. All the following are organelles found only in plants EXCEPT

A. Cholorplast
B. Contractile vacuole
C. Amyloplast
D. Cell wall

12. The __________________ of the cytoskeleton is made up of fibrous protein.

A. Intermediate filaments
B. Microfilaments
C. Microtubules

13. Cells vary in size.

a. True
b. False

14. The size of the cell is not related to its function.

a. True
b. False

15. Small cells have a ________ surface to volume ratio.

a. Large
b. Small

16. All cells have

A. Plasma membrane
B. Ribosomes
C. DNA
D. All the above

17. _____________ is a disease caused by the buildup of lipids in the central nervous system.

a. Tay Sachs
b. Pompi’s

18. Plasma membranes are selectively permeable allowing some substances to move easily across the membrane while others cannot.

a. True
b. False

19. The plasma membrane is represented as a “Fluid Mosaic” model. The mosaic portion refers to the

A. Phosphate heads of the bilayer
B. Phospholipid bilayer
C. Cholesterol
D. Proteins that are embedded in the membrane

20. Cholesterol in the plasma membrane acts as a “temperature buffer” for the membrane.

a. True
b. False

21. The membrane remains fluid in lower temperature if it is rich in phospholipids with

A. Only a and c
B. Only b and c
C. Unsaturated hydrocarbon tails
D. Saturated hydrocarbon tails
E. “Kinked” phospholipids

22. Diffusion occurs across a membrane from an area of _______ concentration, to an area of _________ concentration.

A. High, low
B. Low, high
C. Neither, diffusion is a state of equilibrium.

23. A type of molecule that diffuses easily across a membrane is

A. Oxygen
B. Carbon dioxide
C. Lipids
D. Water
E. All of the above

24. Osmosis is the diffusion of ___________ across a membrane.

A. Oxygen
B. Lipids
C. Water
D. Non-polar molecules

25. Hypertonic solutions refer to solutions that have

A. The same amount of solutes and water.
B. More solutes, less water
C. Less solutes, more water

26. An animal cell placed in a hypotonic solution will

A. Plasmolyze
B. Become flaccid
C. Shrivel
D. Become turgid
E. Lyses

27. A plant cell in a hypotonic solution will

A. Shrivel
B. Plasmolyze
C. Become flaccid
D. Lysed
E. Become turgid

28. The uptake of fluids into a cell is called

A. Pinocytosis
B. Exocytosis
C. Receptor-mediated endocytosis
D. Phagocytosis

29. Photosynthesis is a series of what type of reactions?

A. Exergonic
B. Endergonic
C. Potential
D. Kenitic

30. Active transport is the movement of molecules up the concentration gradient.

a. True
b. False

31. The composition of an ATP nucleotide consists of the following EXCEPT

A. Ribose
B. Nitrogenous base Adenine
C. Nitrogenous base Thymine
D. Three phosphate groups

32. An enzyme has a specific reactant called the

A. Substrate
B. Active site
C. Catalyst
D. Product

33. Which of the following is an enzyme.

A. Sucrase
B. Glucose
C. Fructose
D. Sucrose

34. Binding (an induced fit) causes the enzyme to change slightly.

a. True
b. False

35. Some of the enzyme is used up in the reaction.

a. True
b. False

36. Which of following can denature an enzyme?

A. Temperature change
B. Change in pH
C. Salt concentration
D. All the above
E. None of the above

37. A non-competitive enzyme inhibitor

A. Binds to the active site of the enzyme so the substrate cannot bind to it
B. Changes the shape of the enzyme so the substrate cannot bind to it
C. Does not bind to the active site of the enzyme
D. Both a and b
E. Both b and c

38. __________________ are small pores in the epidermis of a leaf that allow CO2 and O to enter and leave the leaf.

A. Stomata
B. Palisade mesophyll
C. Spongy mesophyll
D. None of the above; all refer to the layers of the epidermis

39. The most abundant photosynthetic pigment

A. Anthocyanin
B. Xanthophyll
C. Chlorophyll a
D. Chlorophyll b
E. Carotenoid

40. In the photosynthetic process which of the following is activated first?

A. Photosystem I
B. Photosystem II
C. Electron transport chain

41. Photosystem II contains chlorophyll a _____

a. P700
b. P680

42. A Photosystem consists of a

A. Light harvesting complex
B. Reaction center
C. Primary electron acceptor
D. All the above

43. The chemical energy produced by photosynthesis is

A. ATP
B. ADP
C. NADPH
D. Both a and b
E. Both a and c

44. The light reactions of photosynthesis convert solar energy into chemical energy.

a. True
b. False

45. The Calvin Cycle converts CO2 into O2.

a. True
b. False

46. The Calvin Cycle occurs in the

A. Grana
B. Thylakoid membrane
C. Stomata
D. Stroma

47. The Calvin Cycle produces

A. NADPH
B. ATP
C. Oxygen
D. Glucose