Exam 3 clicker ?s

Where does the Calvin cycle take place? A. Grana B. Stroma C. Thylakoid membrane D. Inner membrane E. Outer membrane

B. Stroma

Where did the carbon needed to make this starch come from? A. Air, entering via leaves B. Water, entering via roots and leaves. C. The ground, entering via roots.

A. Air, entering via leaves

A mutation that blocks receptor binding to the G protein would do what? A. Inhibit the Fight or Flight Response. B. Over-activate the Fight or Flight Response. C. Would have no effect on the response.

A. Inhibit the Fight or Flight Response.

What type of interaction is likely important for ligand binding to the phosphotyrosine residues in the receptor? A. Ionic B. Hydrophobic C. Covalent

A. Ionic

Nerve growth factor is a water-soluble signaling molecule. Would you expect the receptor for NGF to be intracellular or embedded in the plasma membrane? A. Membrane B. Intracellular

A. Membrane

Which is analogous to the interaction between a ligand and its receptor? A. Substrate recognition and induced fit during enzyme catalysis B. Formation of covalent bonds in anabolism C. Redox reactions in photosynthesis

A. Substrate recognition and induced fit during enzyme catalysis

The role of the antenna complex in a photosystem is to: A. capture photons from sunlight. B. generate glucose. C. generate NADPH. D. transfer excited electrons to the primary electron acceptor.

A. capture photons from sunlight.

If the gene encoding the enzyme rubisco is mutated such that it is non-functional, the process that would be affected is the ability to A. fix carbon. B. make ATP. C. make NADPH. D. make O2. E. harvest photons.

A. fix carbon.

The Calvin cycle requires all of the following except A. oxygen. B. carbon dioxide. C. NADPH. D. ATP.

A. oxygen.

Flattened sacs of internal membranes associated with photosynthesis are called A. thylakoids. B. cristae. C. photosystems. D. chloroplasts. E. the stroma.

A. thylakoids.

Which will cause diarrhea? A. A receptor that can't push GDP off the G protein. B. A G protein that can't hydrolyze GTP. C. An Adenylyl cyclase that can't make cAMP. D. A protein kinase A that can't phosphorylate its targets.

B. A G protein that can't hydrolyze GTP.

You are studying the fight or flight response in cultured liver cells. You inject these cells with cAMP. This should: A. Inhibit the Fight or Flight Response. B. Activate the Fight or Flight Response. C. Have no effect on the response.

B. Activate the Fight or Flight Response.

Which statement is most accurate? A. Cellular respiration occurs only in animal cells, and photosynthesis occurs only in plant cells. B. Cellular respiration occurs in plant and animal cells, and photosynthesis occurs only in plant cells. C. Cellular respiration occurs only in animal cells, and photosynthesis occurs in plant and animal cells D. Cellular respiration occurs in plant and animal cells, and photosynthesis occurs in plant and animal cells.

B. Cellular respiration occurs in plant and animal cells, and photosynthesis occurs only in plant cells.

Based on the purpose of adrenaline, phosphorylation should ____ glycogen synthase and ____ glycogen phosphorylase. A. Activate, Inactivate B. Inactivate, Activate

B. Inactivate, Activate

Which of the following statements about photosynthesis is most accurate? A. Photosynthesis is exergonic, and powered by ATP B. Photosynthesis is endergonic, and is powered by energy from the sun C. Photosynthesis is exergonic, and is powered by energy from the sun D. Photosynthesis is endergonic, and powered by ATP

B. Photosynthesis is endergonic, and is powered by energy from the sun

Inside the chloroplast, where are organic molecules (sugars) made? A. Between the outer and inner membranes B. Stroma C. On the cristae D. Inside the thylakoid E. On the thylakoid membrane

B. Stroma

If the antenna complex did not exist in a particular plant cell, what effect would that have on photosynthesis? A. These cells would be unable to absorb any light energy B. These cells would have a reduced capacity to generate glucose C. There would be no expected effect on photosynthesis D. These cells would be able to fix more carbon dioxide

B. These cells would have a reduced capacity to generate glucose

If you shine sunlight on chloroplasts in the lab but don't expose them to carbon dioxide, what will happen? A. They will NOT make ATP, but will make NADPH and glucose. B. They will make ATP, NADPH, but NOT glucose. C. They will make glucose, but will NOT make ATP or NADPH. D. They will NOT make ATP, NADPH, or glucose.

B. They will make ATP, NADPH, but NOT glucose.

You are working on a research project that involves a mutational analysis of the light harvesting complex Lhca1, which is an important light harvesting complex found in plants. Your lab mate asks where this complex is located. You say it is in the A. outer chloroplast membrane. B. thylakoid membrane. C. plasma membrane. D. inner chloroplast membrane. E. the stroma.

B. thylakoid membrane.

What is the direct source of energy that is used to convert low-energy, inorganic CO2 into the high-energy, organic carbon in sugar in the Calvin Cycle? A. Sunlight B. Glucose C. ATP and NADPH D. Water

C. ATP and NADPH

Which level of control do kinases act on? A. DNA -X- mRNA-->protein-->active protein B. DNA--> mRNA-X-protein-->active protein C. DNA-->mRNA-->protein-X-active protein

C. DNA-->mRNA-->protein-X-active protein

If hormones have the ability to reach almost all cells in the body, does that mean that almost all cells will respond to those hormones? A. Yes, if the hormones can reach the cells, the cells will react. B. Yes, if the hormones can reach the cell receptors, the cells will react. C. Not necessarily, cells vary in their receptor types.

C. Not necessarily, cells vary in their receptor types.

Starting with ribulose 1,5-bisphosphate (RuBP) and CO2, what are the three stages of the Calvin Cycle in the order they occur? A. regeneration of RuBP, reduction of carbon, carbon fixation B. photosystem I, ETC, photosystem II C. carbon fixation, reduction of carbon, regeneration of RuBP. D. photosystem II, ETC, photosystem I

C. carbon fixation, reduction of carbon, regeneration of RuBP.

In plants, photosystems I and II both : A. split water to donate an electron to the reaction center. B. are found in the stroma. C. contain a reaction center composed of chlorophyll A. D. pass electrons to a ETC to create a proton gradient. E. generate oxygen from H2O.

C. contain a reaction center composed of chlorophyll A.

The light-independent reactions of photosynthesis A. use NADPH to oxidize PGA to G3P. B. only occur at night. C. convert CO2 into molecules that are used to make glucose. D. generate ATP and NADPH needed by the Calvin cycle.

C. convert CO2 into molecules that are used to make glucose.

In order to generate one glucose molecule, the Calvin cycle has to turn how many times? A. 1 B. 2 C. 3 D. 6 E. 12

D. 6

You have a suspension of chloroplasts with thylakoid membranes that are permeable to protons. Which stage(s) of the light-dependent reactions will not occur in these chloroplasts? A. Primary photo event B. Charge separation C. Electron transport D. Chemiosmosis

D. Chemiosmosis

Why is the development of a chemiosmotic gradient by PSI needed? A. The proton gradient supplies NADP+ with H+. In combination with electrons from the 2nd ETC this makes NADPH. B. Protons concentrated in the thylakoid space provide the hydrogen needed to reduce CO2 to glucose (C6H12O12). C. The proton gradient provides the energy needed to drive the light-dependent reactions D. The gradient drives the production of ATP, which is needed for the light-independent reactions.

D. The gradient drives the production of ATP, which is needed for the light-independent reactions.

Which of the following statements about paracrine signals is most accurate? A. They are long-lived with widespread effects B. They are short-lived with widespread effects C. They are long-lived with local effects D. They are short-lived with local effects

D. They are short-lived with local effects

Cyclic electron flow in photosynthesis A. causes an electron to cycle from photosystem 2 to photosystem 1 and back again. B. does not require light energy. C. results in production of NADPH but not ATP. D. is a mechanism that allows ATP synthesis without making NADPH.

D. is a mechanism that allows ATP synthesis without making NADPH.

Molecules that absorb light are called A. electron carriers. B. absorbers. C. enzymes. D. pigments. E. photosynthesizers.

D. pigments.