Name
Date
Home Work 2
1. What is a difference between Gram Negative and Gram Positive Bacteria
a. The thickness of the Peptidoglycan layer
b. The presence/absence of an outer membrane
c. The charge of the intracellular cytoplasm
d. Both A & B
e. All of the above
2. What are Hydrogen bonds
a. Weak attractions between Hydrogen atoms and the negative portion of a polar
molecule
b. Strong, irreversible bond between hydrogen and oxygen atoms in a water molecule
c. The bonds that hold amino acids together in protein
d. The bond that forms when an atom loses an electron
3. Describe facilitated diffusion (1-2 sentences)
4. What are the main functions of the cell wall?
a. Provides the rigid shape of the cell
b. Protects against osmotic forces
c. Produces ATP via the electron transport chain
d. Both A & B
e. All of the above
5. What are the two main differences between passive and active transport?
6. Which cells stain purple with Gram Staining and why?
a. Gram Positive
b. Gram Negative
Why are they purple?
7. Would Penicillin be more effective against Gram Positive or Gram Negative bacteria and why?
8. Match the following:
_____Simple Diffusion
a. Passage of water in/out of the cell
_____Active Transport
b. Transport of a molecule DOWN a concentration gradient
c. Passage of a molecule across a membrane without the
_____Facilitated Diffusion
aid of any carriers, pores or other intermediaries
d. Transport that requires ATP or proton motive force
_____Osmosis
9. Which of the following is used by a bacterium for attachment
a. Flagella
b. Pilus
c. Cytoplasmic Membrane
d. Capsule
10. What reactions use ATP to create biomolecules used by the cell
a. Catabolic reactions
b. Anabolic reactions
c. Metastatic reactions
d. Redox reactions
11. What is the difference between competitive and non-competitive enzyme inhibition?
12. What is the main purpose of Glycolysis?
a. To produce 2 molecules of ATP
b. To produce 2 Pyruvate molecules to power the TCA cycle
c. To produce reduced electron carriers (NADH)
d. All of the above
13. Which process generates the most ATP?
a. Anaerobic Respiration
b. Aerobic Respiration
c. Fermentation
d. Oxidation
14. Explain the difference between anabolism and catabolism in terms of ATP
15. Why are concentration gradients, such as the proton gradient in the electron transport system,
so important in biology?
Lab Questions
16. What is the total magnification of a 20X objective lens on a compound microscope?
a. 20 diameters
b. 200 diameters
c. 2000 diameters
17. What is the purpose of the Iris Diaphragm on a compound microscope?
18. What does heat fixing do to the bacteria on a slide?