Biological Molecules

Question 1

What are the four main types of biological molecules?

Answer 1

Carbohydrates, lipids, proteins, and nucleic acids.

Question 2

True or False: Enzymes are a type of carbohydrate.

Answer 2

False.

Question 3

What is the basic building block of proteins?

Answer 3

Amino acids.

Question 4

Fill in the blank: Nucleic acids are made up of __________.

Answer 4

Nucleotides.

Question 5

Which type of bond connects amino acids in a protein?

Answer 5

Peptide bonds.

Question 6

What is the primary function of carbohydrates in living organisms?

Answer 6

To provide energy.

Question 7

What is the difference between saturated and unsaturated fats?

Answer 7

Saturated fats have no double bonds between carbon atoms; unsaturated fats have one or more double bonds.

Question 8

True or False: DNA is a type of protein.

Answer 8

False.

Question 9

What is the role of enzymes in biological reactions?

Answer 9

To speed up the reactions by lowering the activation energy.

Question 10

What are lipids primarily composed of?

Answer 10

Fatty acids and glycerol.

Question 11

Which biological molecule serves as the genetic material in cells?

Answer 11

Nucleic acids (DNA).

Question 12

What is the function of ribonucleic acid (RNA)?

Answer 12

To act as a messenger carrying instructions from DNA for controlling the synthesis of proteins.

Question 13

Fill in the blank: The process of breaking down glucose to release energy is called __________.

Answer 13

Cellular respiration.

Question 14

What type of carbohydrate is starch?

Answer 14

A polysaccharide.

Question 15

True or False: All proteins are made up of the same 20 amino acids.

Answer 15

True.

Question 16

What is the structure of a phospholipid?

Answer 16

A glycerol molecule bonded to two fatty acids and a phosphate group.

Question 17

Which biological molecule can be described as hydrophilic?

Answer 17

Carbohydrates.

Question 18

What is the primary function of nucleotides in nucleic acids?

Answer 18

To store and transmit genetic information.

Question 19

Fill in the blank: The sequence of amino acids in a protein determines its __________.

Answer 19

Structure and function.

Question 20

What is the function of cholesterol in biological membranes?

Answer 20

To maintain membrane fluidity.

Question 21

What are the two main types of nucleic acids?

Answer 21

DNA and RNA.

Question 22

True or False: Glycogen is a form of energy storage in plants.

Answer 22

False.

Question 23

What is the term for a protein that acts as a biological catalyst?

Answer 23

Enzyme.

Question 24

What do we call the specific region on an enzyme where the substrate binds?

Answer 24

Active site.

Question 25

Which type of bond is formed between the sugar and phosphate in a nucleotide?

Answer 25

Phosphodiester bond.

Question 26

Fill in the blank: The primary structure of a protein is determined by the __________.

Answer 26

Sequence of amino acids.

Question 27

What are the two categories of nucleotides?

Answer 27

Purines and pyrimidines.

Question 28

True or False: All lipids are soluble in water.

Answer 28

False.

Question 29

What is the role of carbohydrates in cell recognition?

Answer 29

They serve as markers on cell surfaces.

Question 30

Which polysaccharide is found in the cell walls of plants?

Answer 30

Cellulose.

Question 31

What is the main component of the plasma membrane?

Answer 31

Phospholipid bilayer.

Question 32

Fill in the blank: The secondary structure of a protein is formed by __________.

Answer 32

Hydrogen bonding between the backbone.

Question 33

What is a common test for the presence of reducing sugars?

Answer 33

Benedict's test.

Question 34

What is the primary energy currency of the cell?

Answer 34

Adenosine triphosphate (ATP).

Question 35

True or False: Enzymes are consumed in the reactions they catalyze.

Answer 35

False.

Question 36

What type of biomolecule is insulin?

Answer 36

Protein.

Question 37

Fill in the blank: The tertiary structure of a protein refers to its __________.

Answer 37

Overall three-dimensional shape.

Question 38

What is the main storage form of glucose in animals?

Answer 38

Glycogen.

Question 39

What type of bond holds the double helix structure of DNA together?

Answer 39

Hydrogen bonds between complementary base pairs.

Question 40

True or False: All enzymes are proteins.

Answer 40

True.

Question 41

What is the role of ATP in cellular processes?

Answer 41

To provide energy for various cellular activities.

Question 42

Fill in the blank: The primary function of proteins is to __________.

Answer 42

Perform a variety of functions including catalysis, structure, and transport.