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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: 23193

#Unit 13. Methods in Biology

When you try to image two fluorescent spots separated by 75 nm the fluorescence overlap so much that they look like one spot. Which microscopy can resolve this?
TLS Online TPP Program

#Question id: 34157

#Unit 7. System Physiology – Animal

Which of the following enzyme catalyzes the formation of epinephrine from norepinephrine?
TLS Online TPP Program

#Question id: 3253

#Unit 11. Evolution and Behavior

In a population 64% individuals of 1000 population are affected with autosomes dominant diseased. How many individuals are expected carry at least one dominant allele?
TLS Online TPP Program

#Question id: 1180

#Unit 4. Cell Communication and Cell Signaling

In which of the following double-mutant flies will R7 photoreceptors develop normally?
TLS Online TPP Program

#Question id: 4744

#Unit 8. Inheritance Biology

Assume that long ear lobes in humans are an autosomal dominant trait that exhibits 50% penetrance. A person who is heterozygous for long ear lobes mates with a person who is homozygous for normal ear lobes. What is the probability that their first child will have long ear lobes.