TLS Online TPP Program

#Question id: 10365


Why the nitrogenase enzymes catalyzes the nitrogen fixation reaction only in microanaerobic or anaerobic conditions?

#Botany
  1. O2 form ROS (reactive oxygen species) that inhibits the enzyme nitrogenase
  2. Oxygen, being a strong electron acceptor, can damage these sites and irreversibly inactivate nitrogenase, so nitrogen must be fixed under anaerobic conditions
  3. Because lack a PSI, the oxygen-producing photosystem of chloroplasts, so they do not generate oxygen
  4. nitrogenase enzymes only active in anaerobic environment and inhibit in the aerobic environment due to O2
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TLS Online TPP Program

#Question id: 40289

#Applied Microbiology

Read the following statements regarding Ribulose bisphosphate carboxylase (RuBisCO) and choose the correct option.

Statement I: RuBisCO is the most abundant protein on Earth.

Statement II: It is an enzyme found primarily in the animal kingdom.

TLS Online TPP Program

#Question id: 40290

#Applied Microbiology

Assertion (A): Ribulose bisphosphate carboxylase (RuBisCO) is considered the most abundant protein on Earth.

Reason (R): It is the key enzyme that initiates the process of carbon fixation in the Calvin cycle of photosynthesis, a process occurring on a massive global scale.

TLS Online TPP Program

#Question id: 40295

#Applied Microbiology

Which of the following processes is directly catalyzed by the most abundant protein on Earth (RuBisCO)?

TLS Online TPP Program

#Question id: 40367

#Botany

Which of the following statements regarding Heterospory and Seed Habit are Correct?

A. Heterospory refers to the production of two distinct types of spores: macrospores (female) and microspores (male).

B. Selaginella and Salvinia are classic examples of homosporous pteridophytes.

C. The retention of the female gametophyte on the parent sporophyte for variable periods is a precursor to the seed habit.

D. In heterosporous plants, the gametophytes are nutritionally independent and free-living

Choose the correct answer from the options given below:

TLS Online TPP Program

#Question id: 40373

#Botany

Identify the INCORRECT statement regarding the structure of DNA and nucleosomes.

TLS Online TPP Program

#Question id: 40374

#Botany

Given below are two statements:
Assertion (A): The drug 'Belladonna', used to dilate pupils during eye exams, is obtained from Atropa belladonna.
Reason (R): Atropa belladonna belongs to the family Solanaceae and contains alkaloids like Atropine.
Choose the correct answer: