Biochemistry 2 Revision

biochemistry-2-revision

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What are lipids used for?

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What's the difference between complex lipids and simple lipids?

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Explanation

Complex lipids are actually easier to draw than simple lipids. Complex ones are most common in nature but those that are simple tend to have more specific functions.

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Name a complex lipid.

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What is the formula of stearate?

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Where do fatty acids come from?

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Name the lipases produced by the pancreas.

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What does triacylglycerol lipase do?

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Explanation

Triacylglycerol lipase catalyses the hydrolysis of TAGs at their 1&3 positions - which ever part of the TG that the enxyme attacks is denoted as position 3 in that instance

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What can triacylglycerol lipase produce from TAGs?

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What can phospholipase A2 do?

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Explanation

Phospolipase A2 acts upon phospolipids to aid their digestion by removal of the fatty acid residue from position C2 by breaking the ester linkage. This produces a lysophospholipid and fatty acid

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Lipoprotein is found where in the body?

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Explanation

Lipoprotein lipase is found on capillary surfaces of the tissues that absorb lipid from the blood eg mammary, adipose and muscle.

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What is lipoprotein lipase activated by?

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Explanation

The enzyme is activated by the Apo-CIII (AKA Apolipoprotein) component of chyomicrons

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When metabolised fatty acids that contain even and odd numbers of carbon atoms respectively, are always found to be metabolised into....?

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Explanation

This occurs because 2 Ch2 are removed at a time. Where there is a beta carbon, it can be oxidised and then the bond between the alpha and beta carbons in the fatty acid chain can be broken.

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Beta-oxidation of fatty acids: Stage 1

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This stage of beta oxidation of fatty acids occurs

It involves the binding of the fatty acid to

to form

This reaction is catalysed by

and the reaction looks like this: RCOO- + CoA + ATP <--> Acyl-CoA + AMP+ PPi

This reaction is driven to the right hand by removal of

by way of

The overall reaction is therefore: RCOO- + CoA + ATP + H2) --> Acyl-CoA + AMP + 2Pi + 2H+

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Beta oxidation of fatty acids: Stage 2 - transport

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Match the text
Attaches to acyl-CoA in place of CoA in the intermembrane space
Catalyses the replacement of CoA on the inner mitochondrial membrane
Never crosses the mitochondrial membrane
Carntine acyltransferase II
Exits the matrix into the intermembrane space and is recycled
Hydroxyl group on carnitine

Click and drag
Replaces carnitine with CoA in matrix
Acyl group attaches here
Carnitine
Coenzyme A
Carnitine
Carnitine acyltransferase I

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Biochemistry 2 Revision

Question 1 of 1

Time Left

What are lipids used for?

Select the correct answer(s).

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What's the difference between complex lipids and simple lipids?

Select the correct answer(s).

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Explanation

Name a complex lipid.

Select the correct answer(s).

(0/0)

What is the formula of stearate?

Select the correct answer(s).

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Where do fatty acids come from?

Select the correct answer(s).

(0/0)

Name the lipases produced by the pancreas.

Select the correct answer(s).

(0/0)

What does triacylglycerol lipase do?

Select the correct answer(s).

(0/0)

Explanation

What can triacylglycerol lipase produce from TAGs?

Select the correct answer(s).

(0/0)

What can phospholipase A2 do?

Select the correct answer(s).

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Explanation

Lipoprotein is found where in the body?

Select the correct answer(s).

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Explanation

What is lipoprotein lipase activated by?

Select the correct answer(s).

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Explanation

When metabolised fatty acids that contain even and odd numbers of carbon atoms respectively, are always found to be metabolised into....?

Select the correct answer(s).

(0/0)

Explanation

Beta-oxidation of fatty acids: Stage 1

Fill in the blanks

(0/0)

Beta oxidation of fatty acids: Stage 2 - transport

Match the text (click and drag)

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Attaches to acyl-CoA in place of CoA in the intermembrane space

Catalyses the replacement of CoA on the inner mitochondrial membrane

Never crosses the mitochondrial membrane

Carntine acyltransferase II

Exits the matrix into the intermembrane space and is recycled

Hydroxyl group on carnitine

Replaces carnitine with CoA in matrix

Acyl group attaches here

Carnitine

Coenzyme A

Carnitine

Carnitine acyltransferase I

Beta oxidation of fatty acids stage 3 : Oxidation. How long is the process to remove 2C and when does this stop repeating?

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Explanation

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