Mid Term Test

Question 1

What kind of carbohydrate is glucose?

Answer 1

monosaccharide

Question 2

Lipids can be involved in all of the following process except:

a. energy storage
b. catalysing chemical reactions
c. acting as vitamins
d. acting as signal molecules
e. providing padding to essential organs

Answer 2

b: catalysing chemical reactions

Question 3

Which of the following associations between amino acid R groups are the strongest?

a. hydrogen bonds
b. hydrophobic interactions
c. peptide bonds
d. ionic bonds
e. disulphide bridges

Answer 3

e. disuplhide bridges

Question 4

How was the artificial sweetener, aspartame discovered?

Answer 4

while researching treatments for gastric ulcers the scientist accidentally got some on his hand, and later licked it and noticed a sweet taste

Question 5

What is the name of the covalent bonds that join amino acids together?

Answer 5

Peptide bonds

Question 6

Which of the following elements is mismatched with its properties or functions?

Select one:

a. hydrogen – very electronegative
b. carbon – forms the back bone of organic compounds
c. nitrogen – component of proteins
d. oxygen – can participate in hydrogen bonding
e. all of the others are correctly matched

Answer 6

a. hydrogen – very electronegative

Question 7

What is the name of the covalent bonds that join nucleotides together?

Answer 7

e. peptide

Question 8

Which of the following levels of protein structure can include hydrogen bonding?

Select one:

a. primary, secondary and tertiary
b. primary and tertiary
c. secondary, tertiary and quaternary
d. primary, secondary, tertiary and quaternary
e. primary and secondary

Answer 8

c. secondary, tertiary and quaternary

Question 9

Which parts of an amino acid contribute most to the tertiary and quaternary structure of a protein?

Answer 9

both the amino group and the carboxylic acid group contribute

Question 10

Saturated fatty acids are so named because they are saturated with:

Answer 10

Hydrogen

Question 11

What is the general formula for a carbohydrate?

Answer 11

𝐶𝑥(𝐻2𝑂)𝑦

Question 12

Which forces help geckos to climb up a wall?

Answer 12

van der Waals force

Question 13

How many bonds can each carbon atom make?

Answer 13

4

Question 14

What is the difference between storage polysaccharides and structural polysaccharides?

Answer 14

Storage polysaccharides include examples such as starch and glycogen, and structural polysaccharides include examples such as cellulose and chitin.

Question 15

What is a structural polysaccharide?

Answer 15

Structural Polysaccharides are polysaccharides that take part in forming the structural frame work of the cell walls in plants and skeleton of animals. Structural polysaccharides are of two main types: chitin and cellulose.

Question 16

What are some examples of saturated fats?

Answer 16

Examples of foods containing a high proportion of saturated fat include animal fat products such as cream, cheese, butter, other whole milk dairy products and fatty meats which also contain dietary cholesterol. Certain vegetable products have high saturated fat content, such as coconut oil and palm kernel oil.

Question 17

What are some examples of unsaturated fats?

Answer 17

Foods containing unsaturated fats include avocado, nuts, olive oils, and vegetable oils such as canola. Meat products contain both saturated and unsaturated fats.

Question 18

Are saturated fats found in plants or animals?

Answer 18

It is mainly found in animal products but can be found in some plant sources.

Question 19

Are un-saturated fats found in plants or animals?

Answer 19

Unsaturated fat typically comes from plant sources such as olives, nuts, or seeds – but unsaturated fat is also present in fish.

Question 20

What is the general formula for a protein?

Answer 20

RCH(NH2)COOH

Question 21

The synthetic process by which monomers are covalently linked is called?

Answer 21

Condensation

Question 22

Which are stronger? Covalent or hydrogen bonds?

Answer 22

Covalent bonds

Question 23

Which organ of the body stores the most carbohydrate?

Answer 23

The liver

Question 24

What are ribosomes?

Answer 24

Ribosomes link amino acids together in the order specified by messenger RNA molecules.

Question 25

What is the name of the covalent bonds that join nucleotides together?

Answer 25

Phosphodiester

Question 26

Which atoms are most likely to form an ionic bond?

Answer 26

Sodium and chlorine

Question 27

Saturated fatty acids are so named because they are saturated with?

Answer 27

Hydrogen

Question 28

What kind of carbohydrate is glucose?

Answer 28

Monosaccharide

Question 29

What is most likely to contain saturated rather than unsaturated fats?

Answer 29

Human brain

Question 30

Structural polysaccharides usually?

Answer 30

Have extensive hydrogen bonding between adjacent molecules

Question 31

Where is the energy stored in a molecule of ATP?

Answer 31

In the bonds connecting the two terminal phosphate groups

Question 32

What is the name of the covalent bonds that join amino acids together?

Answer 32

Peptide bonds

Question 33

Which organ of the body stores the most carbohydrate?

Answer 33

The liver