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TLS Online TPP Program

#Question id: 10366

Cyanobacteria can fixes nitrogen in an anaerobic conditions. Which of the following statements about heterocyst which is specialized cell of blue-green algae is incorrect?

#Unit 6. System Physiology – Plant
  1. Anaerobic conditions are created in specialized cells called heterocysts, it appear to represent an adaptation for nitrogen fixation
  2. A heterocyst in a nonfilament of the nitrogen-fixing cyanobacterium Anabaena, which forms associations with the water fern Azolla
  3. Heterocysts are thick-walled cells that differentiate when filamentous cyanobacteria are deprived of NH4 +
  4. These cells lack photosystem II, the oxygen-producing photosystem of chloroplasts, so they do not generate oxygen
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TLS Online TPP Program

#Question id: 2884

#Unit 2. Cellular Organization

When the temperature of a solution of DNA is raised to near the boiling point of water, the optical density, (called absorbance) at 260 nm markedly increases, a phenomenon known as hyperchromicity. Which of the following statement is INCORRECT from the given set of statements?
TLS Online TPP Program

#Question id: 10619

#Unit 10. Ecological Principles

Which of the following is incorrect?
TLS Online TPP Program

#Question id: 10214

#Unit 6. System Physiology – Plant

LHCII, one of the membrane-bound antenna pigment proteins, which can be phosphorylated and non-phosphorylated by a specific kinase present in thylakoid membrane. Which of the following statements are NOT TRUE ?
TLS Online TPP Program

#Question id: 26801

#Unit 8. Inheritance Biology

Transduction in which any gene can be transferred from one bacterial cell to another by a virus is called
TLS Online TPP Program

#Question id: 28988

#Unit 7. System Physiology – Animal

Adrenal medullary PNMT is induced by_____