What stage of cellular respiration needs ATP?
a. Glycolysis
b. Citric Acid Cycle
c. Oxidative Phosphorylation
d. Pyruvate grooming
e. Electron Transport Chain
f. Chemiosomosis
Answer is a. Glycolysis (Glycolysis is the first step in cellular respiration for both anaerobic and aerobic processes. Glycolysis takes place in the cytosol of a cell. In the cytosol we convert 1 molecule of glucose into 2 molecules of pyruvate. Of course glucose can’t be converted into pyruvate without a little bit of help. This conversion requires 2 NAD+ and some energy, in the form of 2 ATP. Once glycolysis is completed, we are left with 2 pyruvate, 2 NADH, and 4 ATPs as products. Since glycolysis yields 4 ATP, but we had to use 2 ATP in the beginning of the process, the total Net Gain of energy is 2 ATP. The cell will use the 2 ATP for energy. NADH will be recycled back to NAD+ in a future process so that it can be used in glycolysis again. The 2 pyruvate molecules will be used for the second step of cellular respiration.)
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A community refers to ____
a. the interaction between populations and their environment b. the interaction between species and their environment c. an area in which a single species lives d. all species that live and interact in a specific area e. the nonliving components of an area
In garden peas, smooth seeds are dominant to wrinkled ones, and yellow pea color is dominant to green. In a dihybrid cross of SsYy x SsYy, what proportion of the offspring from this cross is expected to be both smooth and yellow?
1.9/16
2.3/16
3.1/16
4.none