PLANT STRUCTURE QUIZ

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

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

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

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Mitochondria can be expected most numerous in

muscle cells

none of these

red blood cells

green cells

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Lysosomes are associated with

storage

photosynthesis

digestion

respiration

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Which cell type is likely to have the most mitochondria?

Slow-twitch muscle

Liver cells

Adipose cells

Fast-twitch muscle

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Which is not true about a photon?

It donates electron to reduce carbon dioxide to glucose

It is a packet of light energy

The shorter the wavelength, the greater the energy of the photons

It is trapped by photosynthetic unit

TRUE ANSWER : ?
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Tonoplast is a membrane around

nucleus

mitochondria

cytoplasm

vacuole

TRUE ANSWER : ?
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In plant cells, which of the following is not a function of the large central vacuoles of plant cells?

Storage of food

Support

Contractile regulation of

Waste storage water content

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Which of the following statements about mitochondrial proteins is true?

All mitochondrial proteins are coded for and synthesized in the mitochondria

All mitochondrial proteins are imported from the cytoplasm

Mitochondrial proteins arise from other mitochondrial proteins

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

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

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

The outer membrane is impermeable to hydrogen ions

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

The outer membrane contains porins

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The fluid matrix of a cell is called the

cytosol

endoplasmic reticulum

cytoskeleton

nucleus

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