TLS Online TPP Program

#Question id: 1035


A new drug is developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin. Is this going to be a good drug?

#Unit 4. Cell Communication and Cell Signaling
  1. Potentially-it would definitely only impair bacteria, but wouldn't matter for the ones that don't use a flagellum to move around.

  2. Potentially-if it could be shown that it also didn't impair the production of the eukaryotic flagellum.

  3. No-our eukaryotic cells depend on flagella to move around in our body, and this would impair that function.

  4. No-bacterial flagella are produced using microtubules, not the protein flagellin. This drug would be useless in eliminating bacteria.

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TLS Online TPP Program

#Question id: 9577

#Unit 10. Ecological Principles

The epidermal coloration of the African grasshopper is a striking example of irreversible developmental responses to environmental conditions. Which of the following statements is true?

TLS Online TPP Program

#Question id: 9578

#Unit 10. Ecological Principles

Bergmann’s rule states that,

TLS Online TPP Program

#Question id: 9579

#Unit 10. Ecological Principles

Allen’s rule states that,

TLS Online TPP Program

#Question id: 9580

#Unit 6. System Physiology – Plant

Many Antenna Complexes Have a common structural motif In all eukaryotic photosynthetic organisms that contain both chlorophyll a and chlorophyll b, the most abundant antenna proteins are members of a large family of structurally related proteins, some of these proteins are associated with PSI and PSII such as LHCI and LHCII , Select the incorrect one regarding LHC complexes;

TLS Online TPP Program

#Question id: 9581

#Unit 6. System Physiology – Plant

These four Photosystem II, Cytochrome b6 f, Photosystem I and ATP synthase integral membrane complexes are vectorially oriented in the thylakoid membrane to function as follows, find out the incorrect statements;

TLS Online TPP Program

#Question id: 9582

#Unit 6. System Physiology – Plant

Electrons ejected from chlorophyll travel through a series of electron carriers organized in the “Z Scheme” shows a current version of the Z scheme, in which all the electron carriers known to function in electron flow from H2O to NADP Presented in the following sequence;

a.) P680 reduce by Yz has received electrons from oxidation of water P680→P680*→pheophytinplastoquinones→ cytochrome b6 f complex→ plastocyanin→ in turn reduces (PSI) P700+

b.) P700+→ P700*→ membrane-bound iron–sulfur proteins → A0→ A1 → flavoprotein ferredoxin–NADP reductase (FNR) soluble → ferredoxin(Fd) → NADP+ to NADPH

c.) P700+→ P700*→ A0→ A1→ membrane-bound iron–sulfur proteins→ ferredoxin(Fd)→ soluble flavoprotein ferredoxin–NADP reductase (FNR)→ NADP+ to NADPH

d.) P680 reduce by Yz has received electrons from oxidation of water P680→P680*→ plastoquinonespheophytin → cytochrome b6 f complex→ plastocyanin→ in turn reduces (PSI) P700+

Which one of the following combinations is correct?