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Which of the following is the source of the carbon in sugar produced during photo-synthesis?
- CO2
- H2O
- Rubisco
- PEP carboxylase
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- In 1976, a team of chemists in the United Kingdom was developing new insecticides by modifying sugars with chlorine Cl2, phosgene Cl2CO, and other toxic gases. One young Member of the team misunderstood his verbal instructions to test a newly made candidate substance. He thought he had been told to taste it. Luckily for him, the substance was not toxic, but it was very sweet. It became the food additive sucralose. Sucralose has three chlorine atoms substituted for three hydroxyl groups of sucrose table sugar. It binds so strongly to the sweet-taste receptors on the tongue that the human brain perceives it as 600 times sweeter than sucrose. Sucralose was originally marketed as an artificial sweetener called Splenda, but it is now available under several other brand names. Researchers investigated whether the body recognizes sucralose as a carbohydrate. They began by feeding sucralose labeled with 14C to volunteers. Analysis of the radioactive molecules in the volunteers urine and feces showed that 92.8 percent of the sucralose passed through the body without being altered. Many people are worried that the chlorine atoms impart toxicity to sucralose. How would you respond to that concern?Which of the following pathways requires molecular oxygen (O2)? a. aerobic respiration b. lactate formation c. alcoholic fermentation d. photosynthesisArrange logically the following steps involved in the translocation of photosynthates, specifically sugar. A. A-D-C-B B. D-A-C-B C. A-B-C-D D. D-A-B-C
- The G3P produced during the Calvin Cycle Reactions can be used by plants to make all of the following except?A. amino acidsB. glycerolC. fatty acidsD. starchE. waterWhich of the following is produced during the light reactions of photosynthesis? C6H12O6 CO2 O2 ADPLight reactions generate the energy-carrier molecules_______ and____ , which are then used in the______ cycle. Carbon fixation combines carbon dioxide with the ivecarbon molecule_________ . Two molecules of________ can be combined to produce the sixcarbon sugar________ .
- Which of the following coenzymes accepts electrons that was removed in the succinate of the Krebs Cycle? A. ADP B. FAD C. GDP D. NAD+One of the catalytic reactions that enzymes can perform is the transfer of phosphate groups from ATP to another substrate. THe first step is the nucleophilic attack of the tertiary phosphate of ATP by the hydroxyl group on SERINE- draw this electrophilic attack.Sucrose is a carbohydrate produced naturally in plants. It is composed of glucose and fructose. Carbohydrates are made by plants which derive their food resources from photosynthesis. What molecules used in photosynthesis are rearranged to produce carbohydrates? Choose ALL that apply.
- The sugar produced during photosynthesis is _________ Select one: a. a polymer, cellulose b. a three carbon molecule, glyceraldehyde-3-phosphate c. a four carbon molecule, malate d. a six carbon molecule, glucose e. a five carbon molecule, ribulose bis-phosphatePlant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? cell biology C6H12O6 CO CO2 O2 H2SSpecify the type of carbon unit that is transferred in one-carbon metabolism by each of the following molecules: 5 10 a. N , N -methylene THF b. serine c. choline d. S-adenosylmethionine