Where in a plant cell does the light dependent portion of photosynthesis occur?

Question

Where in a plant cell does the light dependent portion of photosynthesis occur? Select one: a. Cytoplasm cells b. Mitochondria of cells c. Thylakoid membranes of chloroplasts d. Stroma of chloroplasts e. Membrane of cells Which molecule is considered the major energy carrier molecule for all cells? Select one: a. NAD b. FAD c. DNA d. ATP e. Water Which of the following best summarizes cellular respiration? Select one: a. Transfer energy from the sun to energy of electrons b. Transfer energy from energy storage molecules into energy carrier molecules c. Transfer energy from energy storage molecules into heat energy d. Transfer energy from low energy molecules (water, carbon dioxide)into high energy molecules (glucose) e. Transfer energy from water into elections Which of the following is the most accurate description of a greenhouse gas? Select one: a. A gas that causes acidification of precipitation b. A gas that binds to your hemoglobin molecule c. A gas that traps heat in the atmosphere d. A gas that leads to ocean dead zones e. A gas used to fumigate greenhouses Which of the following reactions requires oxygen? Select one: a. Glycolysis b. Fermentation c. Cellular respiration d. Photosynthesis e. All of them do

Explanation / Answer

17.

Light-dependent reactions occur in the thylakoid membrane. They use light energy to make ATP and NADPH.

So, option C is correct.

18.

ATP is considered as the major energy carrier molecules for all the cells.

Many biological reactions are driven by the hydrolysis of ATP.

So, option D is correct.

19.

Respiration involves transfer of energy in glucose to ATP.

Glucose is an energy storage molecule whereas ATP is an energy carrier molecule.

So, option B is correct.

20.

Green house effect is due to the trapping of earth's heat around its atmosphere.

So, option C is correct.

21.

Glycolysis and fermentation can occur even in to absence of oxygen.

Photosynthesis produces oxygen. It is not a substrate.

Cellular respiration which involves kreb's cycle and ETC require oxygen.

So, option C is correct.

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