Practice Questions

TLS Online TPP Program

#Question id: 12779

Suppose you are studying the nitrogen cycling in a pond ecosystem over the course of a year. While you are collecting data, a flock of 100 Canada geese lands and spends the night during a fall migration. What could you do to eliminate error in your study as a result of this event?

#Unit 10. Ecological Principles

Find out how much nitrogen is consumed in plant material by a Canada goose over about a 12-hour period and multiply this number by 100 and add to the total nitrogen in the ecosystem.
Find out how much nitrogen is eliminated by a Canada goose over about a 12-hour period and multiply this number by 100 and subtract from the total nitrogen in the ecosystem.
Find out how much nitrogen is consumed and eliminated by a Canada goose over about a 12-hour period and multiply this number by 100; enter this +/-value into the nitrogen budget of the ecosystem.
Do nothing. The Canada geese visitation to the lake would have negligible impact on the nitrogen budget of the pond.

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TLS Online TPP Program

#Question id: 29117

#Unit 6. System Physiology – Plant

Light reactions of photosynthesis are carried out by four major protein complexes: Photosystem I (PSI), photosystem II (PSII), the cytochrome b6f complex and ATP synthase. The following are certain statements on PSII:

a. Red light absorbed by photosystem II (PSII) produces a strong oxidant and a weak reductant.

b. Far-red light absorbed by photosystem II (PSI) produces a weak oxidant and a strong reductant.

c. The strong oxidant generated by PSII oxidizes water,

d. The strong reductant generated by PSII oxidizes water

Which one of the following combinations of the above statements is correct?

TLS Online TPP Program

#Question id: 29118

#Unit 6. System Physiology – Plant

Which one of the following statements related to photosynthesis is NOT correct?

TLS Online TPP Program

#Question id: 30045

#Unit 6. System Physiology – Plant

In Which of the following enzymes Light regulates the catalytic activity of four enzymes of the Calvin–Benson cycle directly via the ferredoxin– thioredoxin system?

TLS Online TPP Program

#Question id: 30046

#Unit 6. System Physiology – Plant

The oxygenase activity of rubisco produces one molecule each of 3-phosphoglycerate and 2-phosphoglycolate due to this activity a loss of carbon fixed by the Calvin–Benson cycle and yields 2-phosphoglycolate which is a inhibitor of two chloroplast enzymes known as;

TLS Online TPP Program

#Question id: 31313

#Unit 6. System Physiology – Plant

P680, pheophytin and plastoquinone are held together a group of proteins

TLS Online TPP Program

#Question id: 31361

#Unit 6. System Physiology – Plant

Nonphotochemical quenching in plants results in