Key: Exam #2
Biology 102 Fall 2001
1)
What type of chemical reaction releases energy?A) An Endergonic Reaction
B) An Exergonic Reaction
C) A Metabolic Reaction
D) An Electronic Reaction
E) An Enzyme Catalyzed Reaction
2) Which of the following statements is not true regarding a chemical equilibrium?
A) There is no further net change in the product and reactant at this point
B) Product and reactant concentrations are always equal at this point
C) The rates of the forward and reverse reactions are equal at this point
D) The amount of products and reactants varies for different reactions at this point
3) The amount of energy in the universe is constantly increasing.
A) True
B) False
4) For an enzyme catalyzed reaction which of the following statements are true?
A) The enzyme is not altered by the reaction it catalyzes
B) The enzyme contains a binding site for the substrate(s)
C) The enzyme is highly specific for its substrate
D) The enzyme greatly speeds up the attainment of equilibrium for the reaction
E) All these statements are true for enzyme catalyzed reactions
5) How do enzymes speed up reactions?
A) They provide a source of heat
B) They donate electrons to the mechanism
C) They use ATP
D) They lower the activation energy
6) What is entropy a measure of?
A) The available energy in a molecule
B) The level of disorder
C) The number of electrons
D) The rate of a reaction
7) What molecule do all cells use as a universal source of energy?
A) There is no truly universal source of energy
B) NADH
C) Glucose
D) ATP
E) DNA
8) What results when a series of reactions is under feedback inhibition?
A) Very little product is made
B) A huge amount of product is made
C) The amount of product is kept constant
D) A lot of energy is consumed in the inhibitory mechanism
9) Humans are examples of autotrophic organisms.
A) True
B) False
10) All forms of photosynthesis produce oxygen
A) True
B) False
Use the Following Diagram to Answer Questions 11, 12, and 13

11) Where is the electron transport system located in this diagram?
A) M
B) D
C) L
D) J
E) It is found in several locations
12) Which letter represents the Calvin-Benson Cycle?
A) L
B) A
C) M
D) J
E) D
13) Which part of this diagram represents the primary mechanism for ATP synthesis?
A) A
B) J
C) L
D) M
E) F
14) The concentration of what substance increases in the interior of the
thalkyloid compartment during photosynthesis?
A) H+
B) Chlorophyll
C) Glucose
D) Carotenoids
E) Fatty Acids
15) What are the two primary products of the light dependent reactions of photosynthesis?
A) Glucose and water
B) H+ and Glucose
C) ATP and Glucose
D) ATP and NADPH
E) Proteins and RNA
16) The non-cyclic pathway of photosynthesis produces more ATP than the cyclic pathway.
A) True
B) False
17) Why are the leaves of many plants green?
A) Chlorophyll absorbs green light.
B) Water in the leaves absorbs green light
C) The light from the sun is dominated by the green wavelengths
D) Chlorophyll reflects green light
18) Which process do you think evolved first on earth?
A) Photosynthesis
B) Aerobic Glucose metabolism
19) Which of the following explains the production of ethanol by yeast during fermentation?
A) The ethanol is a biproduct formed to regenerate NAD+
B) The ethanol is formed to store energy
C) The ethanol is used as a substrate for the Krebs cycle
D) The ethanol is used to remove oxygen
20) What process is used to generate ATP during both photosynthesis and glucose metabolism?
A) The flow of H+ through membranes
B) Heat produced by the reactions
C) Electrical current flowing through a "motor like" molecule in the membrane
D) Osmotic force pushing on a "paddle like" molecule in the membrane
Use the following diagram to answer questions 21, 22, and 23

21) Which of the reactions of glucose metabolism take place in the cytoplasm of your cells?
A) All of them do
B) None of them do, all occur in the mitochondrion
C) Only reaction A does
D) Only B and C do
E) Only reaction C does
22) Which of the reactions above produces the most ATP?
A) Reactions associated with A
B) Reactions associated with B
C) Reactions associated with C
D) All of them produce equal amounts of ATP
E) None of these reactions produce ATP, that happens later.
23) What is represented by the arrows associated with F, I and J?
A) Small carbon molecules carried by Co-Enzyme A
B) ATP
C) H+
D) Electrons carried by NAD and FAD
E) Oxygen
24) How does oxygen participate in aerobic glucose metabolism?
A) It acts as a source of electrons needed to breakdown glucose
B) It acts as a sink for electrons released from glucose
C) It plays no role in this type of metabolism
D) It is used to attack the glucose molecule and break it down
25) The initial stages of glycolysis actually consume ATP rather than producing it.
A) True
B) False
26) Which of the following statements is true regarding fermentation?
A) The reactions of fermentation produce additional ATP beyond the amount that
can be produced by glycolysis alone
B) Only bacteria and yeast utilize fermentation
C) Fermentation begins with glucose as a reactant
D) Fermentation occurs in the mitochondrion
27) xylem which is used to move water through the plant "body" is actually made up of the remains of dead cells.
A) True
B) False
28) Which part of certain plants represents a symbiotic relationship with nitrogen fixing bacteria?
A) The periderm
B) The endoderm
C) The pericycle
D) A Root nodule
E) Root hairs
29) Which of the following statements most accurately describes how water moves from
the roots to the leaves of tall trees?
A) The water is actively pumped using ATP
B) The water moves under osmotic pressure
C) The water moves through capillary action
D) The water actually comes from the atmosphere
30) Which of the following are defined as simple plant tissues?
A) Ground Tissue
B) Vascular Tissue
C) Dermal Tissue
D) Both A and B are simple tissues
E) Both A and C are simple tissues
31) What is the mesophyll of plants made of?
A) Waxes and cutin
B) Lignified cell walls
C) Cork but not bark
D) Photosynthetic cells
E) Bundles of phloem
32) Perennial plants complete their life cycle in one year, after which they die
A) True
B) False
Use the following list of plant components to answer questions 33, 34, 35, and 36
A) Stomata
B) Casparian Strip
C) Peridermis
D) Meristem
E) Vascular Cambium
33) Seals the cells surround the root's vascular system
B)
34) Controls the exchange of gases and water across the epidermis
A)
35) Site of secondary growth in trees responsible for wood formation
E)
36) Growing tissues found at the tips of stems and roots
D)
37) Tropical trees do not normally have growth rings
A) True
B) False
38) What is one visible difference that can be used distinguish between monocots and dicots?
A) There are no visibly different features.
B) The branching pattern of their stems
C) The texture of their bark
D) The veining pattern of their leaves
39) What mechanism is used to transport sugars in the vascular system of plants?
A) Pressure
B) Cohesive tension
C) Passive diffusion
D) Gravity
40) Plants can use turgor pressure (water pressure in their cells) to cause movement like the closing
of a venus fly trap or the opening of a stoma in a leaf
A) True
B) False
Extra Credit!
41) What type of plant is a bladder wort (seen in the video "Its a Jungle Out There!)
A) A type of seaweed
B) An African jungle plant
C) A desert plant
D) A carnivorous plant
42) Suppose you discover an organism which uses x-rays rather than sunlight for a photosynthetic
mechanism. Would the energy available for ATP production be greater or less than that
found in sunlight?
A) The energy would be greater
B) The energy would be lower
C) The energy would be equivalent