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Peroxisomes Function and Lipid Biosynthesis Quiz

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Peroxisomes Function and Lipid Biosynthesis Quiz

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Questions and Answers

What is the main function of peroxisomes in plants found in leaves?

Break down fatty acids into acetyl CoA

Convert stored fatty acids in seeds into sugars

Play a role in photorespiration by using up O2 and liberating CO2 (correct)

Catalyze the conversion of fats into sugars using the glyoxylate cycle

What distinguishes glyoxysomes from regular peroxisomes in plants?

Their role in converting lipids into sugars during seed germination (correct)

The presence of rubisco enzyme

Their ability to store lipids

The absence of the glyoxylate cycle

What is the significance of the glyoxylate cycle in plants?

It allows for the breakdown of glucose into succinic acid

It catalyzes the breakdown of peroxisomes

It converts acetyl CoA into fatty acids

It enables the conversion of stored lipids into sugars for growth (correct)

Why are animals unable to convert fatty acids into carbohydrates like plants do?

The glyoxylate cycle is not present in animal cells Signup and view all the answers

What is the primary function of rubisco enzyme in plant metabolism?

Convert O2 into CO2 during photosynthesis Signup and view all the answers

In what process does rubisco sometimes add O2 instead of CO2?

Photorespiration Signup and view all the answers

What is a major function of the oxidative reactions carried out in peroxisomes?

Breakdown of fatty acid molecules by beta oxidation Signup and view all the answers

In which cellular component are cholesterol and dolichol synthesized in animal cells?

Peroxisomes Signup and view all the answers

Where are plasmalogens important membrane components found, particularly in the body?

Heart and brain Signup and view all the answers

What is a family of phospholipids in which one of the hydrocarbon chains is joined to glycerol by an ether bond?

Plasmalogens Signup and view all the answers

What is the process by which fatty acid molecules are shortened sequentially by blocks of two carbon atoms at a time in peroxisomes?

Beta oxidation Signup and view all the answers

Which cells exclusively carry out beta oxidation in peroxisomes rather than mitochondria?

Yeast and plant cells Signup and view all the answers