bio tes 3

The most important role of pigments in photosynthesis is to... A. Capture light energy B. Screen out harmful UV rays C. Store energy D. Catalyze the hydrolysis of water E. Catalyze the synthesis of ATP

A. Capture Light Energy

What is the ploidy of gametes? A.Haploid B.Diploid C.Polypoid D.Noploid

A. haploid

The oxygen consumed during cellular respiration is involved directly in which process or event? A. Glycolysis B. Accepting electrons at the end of the ETC C. The citric acid cycle D. The oxidation of pyruvate to acetyl CoA E. The Phosphorylation of ADP to form ATP

B. Accepting electrons at the end of the ETC

Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent? A. Electron Transport Chain B. Glycolysis C. The citric acid cycle D. Oxidative Phosphorylation E. Chemiosmosis

B. Glycolysis

The molecule that functions as the reducing agent (electron donor) in a redox reaction A. gains electrons and gain potential energy B. loses electrons and loses potential energy C. Gains electrons and loses potential energy D. loses electrons and gains potential energy E. neither gains nor loses electrons, but gains or loses potential energy

B. loses electrons and loses potential energy

The complete reactions of cellular respiration in the presence of oxygen (C6H12O6+6O2-> 6CO2+ 6H2)+ energy) result in which of the following? A. oxidation of o2 and reduction of H20 B. oxidation of C6H12O6 and reduction of O2 C. Reduction of CO2 and oxidation of O2 D. Reduction of C6H12O6 and oxidation of CO2

B. oxidation of C6H12O6 and reduction of O2

Which of the following reactions produces the oxygen released by photosynthesis? A. reduction of NADP+ B. splitting of water molecules C. chemiosmosis D. electron transfer in photosystem 1.

B. splitting of water molecules

What structure is formed by the reaction center light- harvesting complexes, and primary electron acceptors and is located in the Thylakoid membrane? A. The fluorescence center B. The photosystem C. The electron transport cain D. NADP+ E. ATP synthase

B. the photosystem

The alternative pathways of photosynthesis using C4 or CAM systems are said to be compromises. Why? A. Each one minimizes both water loss and rate of photosynthesis B. C4 compromises on water loss and CAM compromises on photorespiration C. Both minimize photorespiration but expend more ATP during carbon fixation D. CAM plants allow more water loss, while C4 plants allow less CO2 into the plant E. C4 plants allow less water loss but CAM plants allow more water loss

C. Both minimize photorespiration but expend more ATP during carbon fixation

Of the following, which occurs during the Calvin cycle? A. light energy is converted to chemical energy B. ATP and NADPH are synthesized C. CO2 is reduced D. Excited electrons are conveyed from chlorophyll to an electron acceptor E. Photons are absorbed

C. CO2 is reduced

One difference between cancer cells and normal cells is that cancer cells... A. are unable to synthesize DNA b. Are arrested at the phase of the cell cycle c. continue to divide even when they are tightly packed together d. cannot function properly because they are affected by density-dependent inhibition e. are always in the M phase of the cell cycle

C. Continue to divide even when they are tightly packed together

During the S phase of Interphase, what is occurring? A. chromatin condenses to form chromosomes B. Cell size is increases and centrosomes replicate C. DNA is replicated D. Chromosomes move to the center of the cell E. Nothing is happening

C. DNA is replicated

Cell divison is limited by... A. density dependent inhibition b. anchorage dependence c. Metastasis d. A and B e. A, B, and C

D. A and B

Which of following statements about the relationship between photosynthesis and cellular respiration is correct? A. in the cellular respiration, the biochemical pathways of photosynthesis run in reverse. B. in photosynthesis, the biochemical pathways of cellular respiration run in reverse C. cellular respiration occurs only in animals, and photosynthesis occurs only in plants D. There is a net consumption of ATP in cellular respiration and a net production of ATP in photosynthesis E. Cellular respiration is catabolic and photosynthesis is anabolic

E. Cellular respiration is catabolic and photosynthesis is anabolic

Photosynthesis is NOT responsible for A. Oxygen in the atmosphere B. The ozone layer C. MOst of the organic carbon on earth's surface D. Atmospheric CO2 E. Fossil Fuels

E. Fossil Fuels

What is the sequence represents the correct order in which metabolic reactions occur during the complete oxidation of glucose through aerobic respiration?

Glucose, Glycolysis, Pyruvate Oxidation, citric acid cycle, electron transport train

Which of the following statements about NAD+ is true? a. NAD+ is the source of electrons used in oxidation phosphorylation b. NAD+ has more chemical energy than NADH c. NAD+ is oxidized by the action of dehydrogenase enzymes d. NAD+ is reduced to NADH during glycolysis

d. NAD+ is reduced to NADH during glycolysis