PLANT STRUCTURE QUIZ

The cellular organelle associated with secretion is the

mitochondrion

ribosome

golgi complex

lysosome

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Glycolysis

ATP

The redox reactions of electron transport

Creatine phosphate

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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?

None of these

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Which part of a plant contains the male sex cell?

Style

Pollen

Stamen

Ova

TRUE ANSWER : ?
YOUR ANSWER : ?

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

DNA

Enzymes

Ribosomes

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Any system that is not at equilibrium

requires an enzyme to reach equilibrium

is kinetically unstable, although it may be thermodynamically stable

is thermodynamically unstable, although it may be kinetically stable

is rushing toward equilibrium at a very rapid rate

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 strongly resemble prokaryotes, especially in size

Both have their own ribosomes

Both have their own DNA

Both can live and function independently of the cell

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statements about the outer mitochondrial membrane is not true?

The outer membrane contains porins

The outer membrane is about 50% lipid and 50% protein by weight

The outer membrane is highly permeable to substances of small molecular weight

The outer membrane is impermeable to hydrogen ions

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not an electron carrier class in the electron transport chain?

Cytochrome c oxidase

Flavoproteins

Iron - sulfur proteins

Cytochromes

TRUE ANSWER : ?
YOUR ANSWER : ?

Which cell type is likely to have the most mitochondria?

Slow-twitch muscle

Liver cells

Fast-twitch muscle

Adipose cells

TRUE ANSWER : ?
YOUR ANSWER : ?