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Lipids QB Set 2

Total questions: 30

Worksheet time: 11mins

Name
Class
Date
1.

The following are good sources of energy, except:

a)

cholesterol

b)

fatty acids

c)

triglyceride

2.

This form of double bonds (C=C) in fatty acids are artificially produced by chemical hydrogenation:

a)

cis

b)

trans

3.

Triglycerides are composed of fatty acids hooked in what type of linkage to glycerol?

a)

Acid

b)

Ester

c)

Aldehyde

d)

Ketone

e)

Alcohol

4.

The following hormones promote triglyceride catabolism, except:

a)

lipoprotein lipase

b)

cortisol

c)

insulin

d)

hormone-sensitive lipase

5.

Regarding trans fats:

  1. 1. produced to protect baked goods from spoilage

  2. 2. produced to harden vegetable oils into shortening and margarine

  3. 3. are found in dairy products and beef fat

a)

1 and 2

b)

2 and 3

c)

1 and 3

d)

1, 2, 3

6.

The following are needed in the digestion of lipids, except:

a)

bile salts

b)

colipase

c)

pancreozymin

d)

salivary lipase

7.

What is the function of bile in digestion?

a)

Enzymatically hydrolyzes fats

b)

Aids in absorption of triglycerides

c)

Emulsifies fat droplets, increasing surface area

d)

Provides alkaline pH for auto-hydrolysis

e)

Stimulates pancreatic enzymes

8.

What percent of total cholesterol is usually esterified?

a)

none

b)

18%

c)

50%

d)

70%

e)

98%

9.

Most of the cholesterol in the human body:

a)

comes from dietary sources

b)

is synthesized by the liver

c)

circulates as free cholesterol

d)

is converted metabolically from triglyceride

e)

all of the above

10.

In plasma, lipids are made soluble due to their combination with:

a)

Organic solvents

b)

Bile

c)

Protein

d)

Salts

11.

The phospholipid found in highest concentration in the serum is:

a)

Cephalin

b)

Lecithin

c)

Sphingomyelin

d)

Beta-glycerophosphate

e)

Palmitophosphate

12.

Cell membranes are primarily composed of

a)

Lipids, cholesterol, and carbohydrates

b)

Lipids, cholesterol, and proteins

c)

Lipids, nucleic acids, and proteins

d)

Proteins, nucleic acids and carbohydrates

e)

Proteins, cholesterol and carbohydrates

13.

In an aqueous environment, phospholipids form ____ that have a _____ core and ____ surfaces.

a)

Bilayers; hydrophilic; hydrophobic

b)

Monolayers; hydrophilic; hydrophobic

c)

Monolayers; hydrophobic; hydrophilic

d)

Bilayers; hydrophobic; hydrophilic

e)

Bilayers; hydrophilic; hydrophilic

14.

The following contains fatty acid, except

a)

sphingolipid

b)

cholesterol

c)

triacylglycerol

d)

Glycerol phosphatides

15.

A steroid has four basic…

a)

Carbon rings

b)

Hydroxide groups

c)

Triple bonds

16.

Phospholipids have what element in the compound?

a)

phosphorus

b)

phosphatine

c)

proline

d)

phenylalanine

17.

Why do saturated fats pack more tightly and have a more solid consistency than unsaturated fats?

a)

They contain more nitrogen.

b)

They are heavier.

c)

They are water soluble then unsaturated fats.

d)

They have no double or triple bonds to put kinks in the fatty acids.

18.

This serves as the building block for triglyceride and phospholipids synthesis:

a)

fatty acids

b)

amino acids

c)

cholesterol

d)

acetate

19.

Major site of lipid digestion and absorption:

a)

stomach

b)

liver

c)

kidney

d)

small intestine

20.

Which of the following statements is not true:

a)

All lipids in plasma circulate in combination with proteins

b)

Lipids are composed of long hydrocarbon chains plus hydroxyl or ester group

c)

Combination of lipids with proteins promotes solubility in aqueous medium

d)

Saturated fatty acids contain double bonds between two adjacent carbon atoms

21.

Which of these are present in both phospholipids and triglycerides?

  1. 1. fatty acids

  2. 2. glycerol

  3. 3. phosphate

a)

1 and 2

b)

1 and 3

c)

2 and 3

d)

1, 2, 3

22.

Which of the following enzymes does not match to their substrate?

a)

Cholesterol esterase = cholesterol ester

b)

Pancreatic lipase = triglyceride

c)

Phospholipase A2 = fatty acids

d)

none

23.

Which of these is responsible for the release of bile from the gallbladder?

a)

secretin

b)

cholecystokinin

c)

mixed micelles

d)

lipase

24.

Which of these helps produce a conducive pH necessary for lipid digestion?

a)

pancreozymin

b)

cholecystokinin

c)

secretin

d)

bile acid

25.

True about essential fatty acids:

  1. 1. important for growth

  2. 2. cannot be produced by the body

  3. 3. linolenic and linoleic acids are examples

  4. 4. arachidonic acid is only sourced from diet

a)

1 and 3

b)

2 and 4

c)

1, 2, 3

d)

1, 2, 3, 4

26.

The most abundant family of lipids in both animal and plants is:

a)

fatty acid

b)

triglycerides

c)

cholesterol

d)

phospholipid

27.

Which of these is involved in the transport of dietary lipids in the circulation?

a)

VLDL

b)

mixed micelles

c)

chylomicrons

d)

LDL

28.

Which of these is insulates your vital organs?

a)

fatty acid

b)

triglycerides

c)

cholesterol

d)

phospholipid

29.

Which of these is a component of bile acids?

a)

fatty acid

b)

triglycerides

c)

cholesterol

d)

phospholipid

30.

Which of these is only sourced from animal products, hence, vegetarians can live without it?

a)

fatty acid

b)

triglycerides

c)

cholesterol

d)

phospholipid

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