Plant Structure MCQs

Question 1

What is the source of free energy (ΔG) for moving protons out of mitochondria against their concentration and electrical gradients?

Accepted Answer

The redox reactions of electron transport

Answer

Glycolysis

Answer

Creatine phosphate

Answer

ATP

Question 2

The cellular organelle associated with photosynthesis is the

Accepted Answer

chloroplast

Answer

golgi complex

Answer

mitochondrion

Answer

lysosome

Question 3

Cellular metabolism is an example of

Accepted Answer

steady-state metabolism

Answer

equilibrium metabolism

Answer

a series of reactions occurring under standard conditions

Answer

a series of reactions that defy the second law of thermodynamics

Question 4

Which of the following experimental results does not support Mitchell's chemiosmosis theory?

Accepted Answer

Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis

Answer

Electron transport in isolated mitochondria was shown to result in acidification of the medium

Answer

Addition of dinitrophenol to isolated mitochondria during electron transport was shown to inhibit acidification of the medium

Answer

An artificial proton gradient across the inner mitochondrial membrane drives ATP synthesis in the absence of electron transport

Question 5

Both plant and animal cell possess

Accepted Answer

mitochondria

Answer

cell walls

Answer

central vacuoles

Answer

chloroplast

Question 6

The cellular organelle associated with secretion is the

Accepted Answer

golgi complex

Answer

mitochondrion

Answer

ribosome

Answer

lysosome

Question 7

Which of the following statements about mitochondrial proteins is true?

Accepted Answer

Some mitochondrial proteins are coded for and synthesized in the mitochondria and others

Answer

All mitochondrial proteins are coded for and synthesized in the mitochondria

Answer

All mitochondrial proteins are imported from the cytoplasm

Answer

Mitochondrial proteins arise from other mitochondrial proteins

Question 8

Cellular organelles are embedded in the

Accepted Answer

cytosol

Answer

endoplasmic reticulum

Answer

cristae

Answer

microtubules

Question 9

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

Accepted Answer

Carnitine

Answer

Acetyl-CoA

Answer

Dolichol

Answer

Malonyl-CoA