Need answers to biology homework please?

Ask Your Question

Need answers to biology homework please?




I had to answer 113 questions for a biology homework, so if you could answer some of the following questions that I didn't know, that would be great, even if you don't know all the answers, any are appreciated :)



1) How many ATP's are available for cell use as a result of glycolysis?

(a) 36

(b) 1

(c) 4

(d) 38

(e) 2

2) Which compound is involved in BOTH the light and dark reactions of photosynthesis?

(a) O2

(b) NADPH2

(c) CO2

(d) Chlorophyll

(e) PGAL

3) Which is NOT found in photosystem II?

(a) Chlorophyll a

(b) Carotenoids

(c) an ETS

(d) P700 reaction center

(e) Chlorophyll P680

4) The Kreb's (Citric Acid) Cycle produces which of the following (carrier) molecules which transfer electrons, H+, and "energy" to the ETS?

(a) FADH2 + NADH2

(b) NADH2, FADH2 + CO2

(c) ATP + FADH2

(d) ATP + CO2

(e) NADH2 + ATP

5) The reduction of NADP to form NADPH2 is associated with

(a) Photosystem II of light reactions

(b) Photosystem I of light reactions

(c) PGAL formation during dark reactions

(d) Oxidation of H2O during photolysis

6) The 'first' pathway of cellular respiration involves

(a) Hydrolysis of glucose to two pyruvate molecules

(b) The synthesis of 6-carbon citric acid from acetyl-CoA

(c) Hydrolysis of 2 ATP molecules to mobilize glucose to a high-energy carbohydrate

(d) Reduction of NAD to NADH2


Update : 7) Muscles produce large amounts of lactic acid during heavy exercise. This is because

(a) Lactic acid increases muscle strength

(b) The rate of O2 delivery to the muscle is inadequate compared to the rate of O2 consumption and energy use

(c) Less O2 is delivered to the muscle during exercise

(d) All of these


Update 2: 8) The purpose of the reaction 2H2O-->4H+O2+4e- is

(a) to supply O2 for the Dark reactions

(b) to provide replacement electrons for chlorophyll molecules in the photosystems

(c) to reduce PGAL during the Calvin cycle

(d) to energize the electrons which will directly phosphorylate ADP to ATP


Update 3: 9) The reaction in #8 above represents the

(a) reduction of H2O at the end of the ETS in aerobic respiration

(b) reduction of H2O at the beginning of photosystem I

(c) oxidation of H2O during the light (dependent) reactions of photosynthesis

(d) formation of water as an end-product of either aerobic or anaerobic respiration or of photosynthesis


Update 4: 10-15 Match letter in the column on the right to its description on the left.

10)Phosphorylation of ADP to ATP (a)Photosystem I

11)RuBP (RuDP) (b)Glycolysis or Kreb's cycle

12)e- acceptance by NAD+ to NADPH (c)Photosystem II

13)Reduction of NADP to NADPH (d)located in reaction centers in photosystems

14)P700 and P680 (e)regenerated constantly in the Calvin cycle

15)Oxidative phosphorylation


Update 5: 16-21 Same directions as above

16)Chlorophyll absorbs light energy

17)O2(g) is used

18)CO2(g) is used

19)Synthesis os ATP + NADPH2

20)Synthesis of PGAL

21)Conversion of pyruvate to lactic acid



Photosynthesis Reaction

(a)Photochemical (photosystems) reactions only

(b)Carbon-fixation reactions only

(c)Both light phase and carbon-fixation

(d)Neither light nor dark phase



Answer this Question:

Close

Close

No Answers Posted Yet.