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TLS Online TPP Program

#Question id: 16957

the immune system can be summarized as follows. Which is not correct for immune system?

#Unit 4. Cell Communication and Cell Signaling
  1. A cell can become more or less susceptible to the actions of a ligand by increasing (up-regulating) or decreasing (down[1]regulating) the expression of the receptor for that li
  2. Ligand binding to the receptor induces a molecular change in the receptor. This change may be in the form of a conformational alteration in the receptor, receptor dimerization or clustering, a change in the receptor’s location in the membrane, or a covalent modification.
  3. a cell must not receive more than one signal through more than one receptor in order to effect a particular outcome.
  4. Integration of all the signals received by a cell occurs at the molecular level inside the recipient cell.
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TLS Online TPP Program

#Question id: 10135

#Unit 6. System Physiology – Plant

Which of the following are strongest reductant?
TLS Online TPP Program

#Question id: 10136

#Unit 6. System Physiology – Plant

A protein complex contain a Rieske protein known as
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

Following are certain statements regarding activated and inactivated form of Rubisco, Which one is INCORRECT?