TLS Online TPP Program

#Question id: 10285


Some of the statements given shows the activity of PFK-1 and PFK-2, which of the following statements incorrectly shown these enzyme activity?

#Unit 6. System Physiology – Plant
  1. Fructose 2,6-bisphosphate is formed by phosphorylation of fructose 6-phosphate, catalyzed by phosphofructokinase-2 (PFK-2), and is broken down by fructose 2,6-bisphosphatase (FBPase-2)
  2. fructose 2,6-bisphosphate is an allosteric activator of PFK-1 activity
  3. PFK-1 is virtually inactive in the absence of fructose2,6-bisphosphate, fructose 2,6-bisphosphate has the opposite effect on FBPase-1: it reduces its affinity for its substrate, thereby slowing gluconeogenesis
  4. cAMP-dependent protein kinase, which transfers a phosphoryl group from ATP to the bifunctional protein PFK-1/FBPase-1. Phosphorylation of this protein enhances its FBPase-1 activity and inhibits its PFK-1 activity

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TLS Online TPP Program

#Question id: 10312

#Unit 6. System Physiology – Plant

Methyl group of acetyl-CoA with the oxaloacetate by using water molecules is coverted to methylene in citrate, this type of reaction catalysed is known as

TLS Online TPP Program

#Question id: 10313

#Unit 6. System Physiology – Plant

Which of the following enzyme are found in the inner membrane of mitochondria?

TLS Online TPP Program

#Question id: 10314

#Unit 6. System Physiology – Plant

How many redox reaction and decarboxylation reaction participate in Kreb’s cycle?

TLS Online TPP Program

#Question id: 10315

#Unit 6. System Physiology – Plant

One of the enzyme of citric acid cycle known as isocitrate dehydrogenase, some of the characterictics are given below;

a) Isocitrate dehydrogenase is found in both cytosol as well as in mitochondria

b) Isocitrate is oxidized by hydride transfer to NAD+ or NADP+ depending on the location whether IDH present in cytosol or mitochondria

c) Isocitrate dehydrogenase forms oncometabolites such as 2-Oxoglutarate

d) Isocitrate dehydrogenase also participate in Glyoxylate cycle

Which of the following characteristics of isocitrate dehydrogenase is incorrect?

TLS Online TPP Program

#Question id: 10316

#Unit 6. System Physiology – Plant

Succinate dehydrogenase an enzyme is inhibited by  Malonate and Oxaloacetate, which of the following graph represents the correct competitve inhibition  of enzyme with these inhibitors?   

TLS Online TPP Program

#Question id: 10317

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following are receptors for cholera toxin?