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TLS Online TPP Program

#Question id: 14754

Plant cells have several internal compartments, each of which can differ in its ionic composition. The cytosol and the vacuole are the most important intracellular compartments that determine the ionic relations of plant cells, Ion concentrations in the cytosol and the vacuole are controlled by passive (dashed arrows) and active (solid arrows) transport processes

Which of the following statement INCORRECT from the above figure;

#Unit 6. System Physiology – Plant

Potassium is accumulated passively by both the cytosol and the vacuole, except when extracellular K+ concentrations are very low, in which case it is taken up actively
All the anions are taken up actively into the cytosol.
Calcium is actively transported out of the cytosol at both the cell membrane and the vacuolar membrane, which is called the tonoplast
Sodium is pumped passively out of the cytosol into the extracellular spaces and vacuolar membrane

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TLS Online TPP Program

#Question id: 26913

#Unit 10. Ecological Principles

Metabolic rate of Ectotherm and endotherm with respect to variable temp, which of the following represented graph is correct?

TLS Online TPP Program

#Question id: 26914

#Unit 10. Ecological Principles

Some given statements about anti freezing are given;

a.some invertebrates to withstand temperatures as low as –18°C without freezing, in presence of glycoproteins

b.Sodium, potassium, or chloride ions involve to increasing the blood freezing point, so the lack of these ions some species help to lower the blood freezing point

c.Amphibians release large amount of glucose into the blood to prevent freezing of blood in cold

d.Sodium, potassium or urea function as anti freezing in their blood

e.Glycine causes supercooling in plants

Which of the following statements about supercooling/anti freezing is correct?

TLS Online TPP Program

#Question id: 26915

#Unit 10. Ecological Principles

Cell walls allow plant cells to build up large internal hydrostatic pressures called

TLS Online TPP Program

#Question id: 26916

#Unit 10. Ecological Principles

If a plant has a fresh weight of 150 g, a dry weight of 100g, and a turgid weight of 160g, what is its relative water content?

TLS Online TPP Program

#Question id: 26917

#Unit 10. Ecological Principles

Which of the following is the correct prediction about the relative water content or RWC?

a.RWC is involve to measure of turgidity and water contents of plant cell

b.To estimate RWC, three measurements are needed: fresh weight, turgid weight, and dry weight

c.In drought condition, plant will die if the RWC values is less than 100%

d.RWC values closer to 100% indicate plants are less affected by drought stress

TLS Online TPP Program

#Question id: 26918

#Unit 10. Ecological Principles

A place where the summary of the organism’s tolerances and requirements, referred to as