26 JULY 2021 CURRENT AFFAIRS QUIZ

If the ester bonds of a triacylglycerol molecule's are broken then the kind of molecule, which would be soluble in water, is

glycogen

steroid

glycerol

fatty acid

TRUE ANSWER : ?
YOUR ANSWER : ?

Water content of active protoplasm is

90%

70%

40%

10%

TRUE ANSWER : ?
YOUR ANSWER : ?

If complex III were incorporated into an artificial lipid vesicle in order to demonstrate it's proton translocating ability in isolation, which of the following would be an appropriate electron donor?

Ubiquinol (UQH2)

Cytochrome c peroxidase

Cytochrome c red

Cytochrome c oxidase

TRUE ANSWER : ?
YOUR ANSWER : ?

Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?

Electrons always go from reductants with high redox potentials to oxidants with low redox potentials

Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions

The rules governing oxidation and reduction apply only in vitro, and not in vivo

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical energy is supplied to eukaryotic cells by

mitochondria only

mitochondria and ribosomes

mitochondria and chloroplasts

chloroplasts and golgi complexes

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following can be found as a part of the mitochondrial matrix?

Enzymes

Ribosomes

All of these

DNA

TRUE ANSWER : ?
YOUR ANSWER : ?

The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

mitochondria are surrounded by a semi permeable membrane

mitochondria were derived from a symbiotic bacterium

the mitochondrial matrix is hypotonic to the cellular cytoplasm

the mitochondrial matrix is hypertonic to the cellular cytoplasm

TRUE ANSWER : ?
YOUR ANSWER : ?

Which molecule serves as a carrier of fatty acids in mitochondria?

Carnitine

Acetyl-CoA

Dolichol

Malonyl-CoA

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

Both have their own ribosomes

Both have their own DNA

Both can live and function independently of the cell

Both strongly resemble prokaryotes, especially in size

TRUE ANSWER : ?
YOUR ANSWER : ?

Which cell type is likely to have the most mitochondria?

Slow-twitch muscle

Liver cells

Adipose cells

Fast-twitch muscle

TRUE ANSWER : ?
YOUR ANSWER : ?