Practice Questions

TLS Online TPP Program

#Question id: 11982

Which of the following is a behavioral pattern that results from a proximate cause?

#Unit 10. Ecological Principles

A cat kills a mouse to obtain food.
A male sheep fights with another male because it helps it to improve its social position and find a mate.
A female bird lays its eggs because the amount of daylight is decreasing slightly each day.
A goose squats and freezes motionless because that behavior helps it to escape a predator.

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TLS Online TPP Program

#Question id: 10137

#Unit 6. System Physiology – Plant

The Calvin–Benson cycle pathway decreases the oxidation state of carbon from the highest value, found in CO2 (+4), to levels found in sugars; +2 in keto groups — CO—; 0 in secondary alcohols —CHOH, In view of its notable capacity for lowering the carbon oxidation state, the Calvin–Benson cycle is also aptly named the

TLS Online TPP Program

#Question id: 10138

#Unit 6. System Physiology – Plant

The Calvin–Benson cycle proceeds in three phases that are highly coordinated in the chloroplast these three phases namely--Carboxylation, Reduction and Regeneration. The following statements are not related to the three phases of Calvin–Benson cycle:

TLS Online TPP Program

#Question id: 10139

#Unit 6. System Physiology – Plant

There are two distinct forms of rubisco. Form I is found in vascular plants, algae, and cyanobacteria; form II is confined to certain photosynthetic bacteria, Some statements about the Rubisco is given;

a.) A complex form I structure with eight identical large subunits each containing a catalytic site, and eight identical small subunits of uncertain function

b.) The form II rubisco of photosynthetic bacteria is simpler in structure, having two subunits that in many respects resemble the large subunits of the plant enzyme

c.) The plant enzyme has an exceptionally low turnover number; only three molecules of CO2 are fixed per second per molecule of rubisco at 25 o C

d.) Rubisco makes up almost 50% of soluble protein in chloroplasts and is probably one of the most abundant enzymes in the biosphere

Which of the following statements about rubisco will true?

TLS Online TPP Program

#Question id: 10140

#Unit 6. System Physiology – Plant