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Mastery Exam DDM biochemistry (vitamins, lipid and metab)

Total questions: 75

Worksheet time: 54mins

Name
Class
Date
1.
Saturated fats are __________ at room temperature.
a)
liquid
b)
gases
c)
plasma
d)
solid
2.
The characteristic that all lipids have in common is----
a)
made of lots of double bonds
b)
acidic when mixed with water
c)
no high energy content
d)
do not dissolve in water
3.

You want to find out if eating foods high in saturated fats will make you healthier. Which of the following is the best dependent variable?

a)

Level of health

b)

Number of grams of saturated fat consumed

c)

Lipid levels in blood

d)

Weight change in pounds

4.
How do lipids function for cells?
a)
store information
b)
store energy
c)
breakdown wastes
d)
join with substrates
5.
Fat digestion occurs in the ___________
a)
mouth
b)
large interstine
c)
stomach
d)
small intestine
6.
What is essential for the breakdown of fat molecules?
a)
bile
b)
simple sugars
c)
polysarrcharide
d)
amylase
7.
Fatty acids are broken down by this process and enter cell respiration.
a)
β-Oxidation
b)
Deamination
c)
Halogenation
d)
Esterification
8.

This is the deposition of lipid plaques on the lining of the arteries

a)

Hyperlipoprotenemia

b)

Hypertension

c)

Diabetes

d)

Atherosclerosis

9.
What are adipose cells?
a)
cells in the body that dissolve fat
b)
cells in the body that add fat
c)
cells in the body that store fat
d)
cells in the body that digest fat
10.

Enzyme responsible in the cleavage of acetoacetyl CoA

a)

Dehydrogenase

b)

Lyase

c)

thiolase

d)

Decarboxylase

11.

Acetoacetate to B-Hydroxybutarate

a)

Chain cleavage

b)

Condensation

c)

Hydrogenation

d)

Oxidation

12.

Reducing agent needed in the process of lipogenesis

a)

NADPH

b)

NADH

c)

FADH2

d)

ATP

13.

How many ATP can a 10c lipids produced?

a)

10

b)

60

c)

64

d)

120

14.

All except one are true about gastric lipase…

a)

Main preduodenal lipase

b)

Hydrolyzes TG containing short and medium chain fatty acids

c)

Primary site of hydrolysis is an 3ester- linkage

d)

Optimum pH is 6.0-7.0

15.

The dietary fats are transported as…

a)

Micelles

b)

chylomicrons

c)

Chyme

d)

fatty acid-albumin complex

16.

One and the only energy requiring step in fatty acid oxidation is catalyzed by which of the following enzymes.

a)

Thiolase

b)

Acyl CoA dehydrogenase

c)

Thiokinase

d)

Beta –OH Acyl coA dehydrogenase

17.

A fatty acid with Lauric acid will undergo how many cycles of beta oxidation

a)

9

b)

7

c)

6

d)

5

18.

What is the molecular basis of the statement “Fats burn in the flame of carbohydrates”?

a)

Fats are hydrolyzed in the presence of carbohydrates

b)

Fatty acids and glucose are simultaneously oxidized

c)

Acetyl coA is the common product of fatty acid and glucose oxidation

d)

Acetyl coA is oxidized completely in the presence of oxaloacetate in TCA cycle

19.

Which of the following is not used for fatty acid synthesis?

a)

cobalamine

b)

NADPH

c)

biotin

d)

bicarbonate

20.

Malonyl-CoA is a direct inhibitor of which enzyme of fatty acid oxidation?

a)

Carnitine Acyl Transferase- I

b)

Carnitine Acyl Transferase – II

c)

Thiokinase

d)

Lipolipase

21.

Which of the following is the primary ketone body?

a)

acetone

b)

acetoacetate

c)

Beta-hydroxy butyrate

d)

Hydroxy methyl glutarate

22.

All are conditions of ketosis except one…

a)

Starvation

b)

Uncontrolled DM

c)

High carbohydrate diet

d)

Von Gierke’s disease

23.

The key regulatory enzyme of cholesterol synthesis is…

a)

HMG- CoA synthase

b)

HMG CoA lyase

c)

HMG CoA reductase

d)

Mevalonate kinase

24.

Choose the incorrect statement about cholesterol synthesis…

a)

All the carbon atoms are derived from Acetyl CoA

b)

Process is cytoplasmic

c)

NADPH is the main coenzyme

d)

Highly expensive energetically

25.

How many ATP are produced by Palmitic acid?

a)

108

b)

56

c)

106

d)

67

26.

How many acetyl CoA is needed to produce acetoacetyl CoA?

a)

1

b)

2

c)

3

d)

4

27.

Lipids are inorganic substances made up of fatty acids and their naturally existing compunds and derivaties.


Lipids present diverse chemical structure.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

28.

Lipids are all unique, they have certain properties in common.


Lipids are all unique, they don’t have anything in common.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

29.

Lipids can be dissolved in organic solvents.


Lipids can be dissolved in ordinary solvents.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

30.

Lipids can be dissolved in water.


Lipids can be dissolved in ordinary solvents.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

31.

True fats are called Basic Fats.


Acidic fats are true fats.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

32.

True fats generally constitute the storage material for energy in animals only.


False fat generally constitute the storage material for energy in plants only.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

33.

Lipids are widely distributed in nature.


Lipids can be an energy source.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

34.

True Fats contain glycerol and fatty acids.


True fats contain glycerol,fatty acids,a nitrogenous base and phosphoric acid.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

35.

Lipids serves as cold insulator. Lipids serves as hot insulator.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

36.

Phospholipids and cerebrosides has a nitrogenous base and acetic acid.


Phospholipids and cerebrosides has a nitrogenous base and phosphoric acid.

a)

First statement is correct. Second statement is wrong

b)

First statement is wrong. Second statement is correct

c)

Both statements are correct’

d)

Both statements are wrong

37.

What is the process in which the saponifiable lipid yield fatty acid and alcohol?

a)

Oxidation

b)

Reduction

c)

Hydrolysis

d)

Conjugation

38.

Saponification is the hydrolysis of fats and oils under what condition?

a)

Acidic

b)

Basic

c)

Neutral

39.

In saponification, what molecule is removed from the fatty acid or ester?

a)

Hydrogen

b)

Sulfur

c)

Water

d)

Urea

40.

The following are precipitated from the solution by the addition of NaCl,except?

a)

Sodium Stearate

b)

Sodium Oleate

c)

Sodium Palmitate

d)

Sodium Hydroxide

41.

The addition of NaCl makes the sodium salt of the fatty acid

a)

Soluble in water

b)

Insoluble in water

42.

The remaining solution after the separation that was caused by NaCl has...

a)

Alcohol and Glycerol

b)

Glycerol and Sodium Chloride

c)

Glycerol and Sodium Hydroxide

d)

Alcohol and Sodium Hydroxide

43.

In the separation of soap by salting out, what was added to the soap solution?

a)

Saturated NaCl Solution

b)

Unsaturated NaCl Solution

c)

Saturated NaOH Solution

d)

Unsaturated NaOH Solution

44.

In the separation of fatty acids and glycerol: after the addition of diluted H2SO4, it was tested with litmus paper. The blue litmus paper turned what?

a)

Blue

b)

Red

c)

Black

d)

White

45.

Test for Glycerol is also known as

a)

Acrolein test

b)

Flame test

c)

Chloroform test

d)

Reflux Distillation

46.

In the saponification of lipids, what method was used?

a)

Simple Distillation

b)

Reflux Distillation

c)

Reflux Filtration

d)

Simple Filtration

47.

What type of ethanol is used in the experiment?

a)

100% ethanol

b)

50% ethanol

c)

95% ethanol

d)

75% ethanol

48.

The following statements are TRUE about lipids EXCEPT…

a)

They are hydrophilic

b)

They are amphipathic

c)

Made up of organic substances

d)

Extraction of lipids require organic solvents

49.

In the determination of the presence of glycerol the test is done by treating the sample with….

a)

NaOH

b)

CHCl3

c)

H2SO4

d)

KHSO4

50.

Which of the following is a monounsaturated fatty acid ?

a)

Oleic acid

b)

Stearic acid

c)

Linoleic acid

d)

Linolenic acid

51.

Olive oil is an example of

a)

sat fat

b)

trans fat

c)

unsat fat

d)

cholesterol

52.

The degree of unsaturation of lipids can be measured by …

a)

Iodine number

b)

Double bond number

c)

Saponification number

d)

Cholesterol ring number

53.

The higher the iodine value of the fat sample means...

a)

Higher degree of saturation

b)

Higher degree of unsaturation

c)

Higher degree of saponification

d)

higher degree of hydrogenation

54.

The purpose of adding 95% C2H5OH in saponification is …

a)

Helps in precipitating fatty acid salts

b)

Help dissolve the non-polar fat so it can react with a strong base.

c)

Help by reacting with the strong base to form water and fatty acid salt.

d)

Helps in separating the polar substances to the fat sample to obtain soap.

55.

In Acrolein test the sample fat is treated with a dehydrating agent . The principle of adding a dehydrating agent to the fat sample is…

a)

The glycerol portion of the fat sample will be converted to a fatty acid salts.

b)

The glycerol portion of the fat sample will be dehydrated forming ester of fatty acids.

c)

The glycerol portion of the fat sample will be dehydrated forming unsaturated aldehyde.

d)

The glycerol portion of the fat sample will be hydrated forming soap and ester fatty acid salts.

56.

Assay of reducing agent

a)

Iodimetry

b)

Iodometry

c)

Neutralization

d)

Acidimetry

57.

Product in Vitamin C titration

a)

Ascorbic acid

b)

Iodine

c)

rehydroascorbic acid

d)

hydrogen

58.

Upon titration of Vitamin C extract, you have used an equivalent amount of iodine which is 61.5ml. Compute for the vitamin C content if;

extract: 100ml

amount needed as analyte in the titration: 30ml

a)

3.154 mg/ml

b)

1.6153 mg/ml

c)

0.8207 mg/ml

d)

3.456 mg/ml

59.

What is the analyte for iodimetry titration in determining vit C content?

a)

Ascorbic acid

b)

Phenolphthalein

c)

Starch

d)

Iodine

60.

Known concentration in the titration process

a)

Analyte

b)

Titrand

c)

Titrant

d)

Indicator

61.

Titration Process in which there is an addition of an excess of standard titrant to the analyte, and then titration of excess titrant to determine how much is in excess

a)

Back titration

b)

Blank titration

c)

Neutralization

d)

Alkalinization

62.

Upon titration of Vitamin C extract, you have used an equivalent amount of iodine which is 31.5ml. Compute for the vitamin C content if;

extract: 100ml

amount needed as analyte in the titration: 30ml

a)

3.154 mg/ml

b)

1.6153 mg/ml

c)

0.8207 mg/ml

d)

3.456 mg/ml

63.

Which of the following best described an analyte?

a)

Solution of known concentration

b)

Chemicals capable of changing color at or near the endpoint

c)

Active constituent

d)

Volumetric solution

64.

Laboratory technique that can be used to determine the oxidixed Fe2+ or reduced Fe3+

a)

Permanganometry

b)

Iodimetry

c)

Iodometry

d)

Cerimetry

65.

analyte is oxidizing agent

a)

Permanganometry

b)

Iodimetry

c)

Iodometry

d)

Cerimetry

66.

Manner of adding indicator: Before reaching Endpoint

a)

Permanganometry

b)

Iodimetry

c)

Iodometry

d)

Cerimetry

67.

Chemical reaction happened during the titration of Vitamin C giving dehydroascorbic acid as its product

a)

Oxidation

b)

Reduction

c)

Sulfation

d)

Chlorination

68.

What is the use of starch in the Vitamin C titration?

a)

Analyte

b)

Indicator

c)

Titrant

d)

Titrand

69.

Titer value of ascorbic acid in iodine volume

a)

50ml

b)

60ml

c)

55ml

d)

65ml

70.

Tricarboxylic acid cycle is the other terms for Krebs Cycle.

a)

true

b)

false

71.

How many ATP can one NADH use?

a)

1

b)

2.5

c)

4

d)

1.5

72.

What will happen to the unused triacylglycerol in the body?

a)

will become acetyl coA

b)

store in adipose tissue

c)

further metabolized entering glycolysis

d)

undergo lypogenesis

73.

What is the purpose of L-carnitine?

a)

Dissolve excess fats in the body

b)

applicable in losing weight

c)

Helps in the entrance of acyl CoA to the inner mitochondria

d)

precursor in the conversion of acyl CoA to acetyl CoA

74.

Special enzyme for unsaturated fatty metabolism

a)

Thiolase

b)

Epimerase

c)

Transaminase

d)

Synthetase

75.

The following will happen in the diabetic patient, EXCEPT...

a)

Increase lypolysis

b)

Decrease reesterification

c)

increase ketone bodies

d)

decrease LDL

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