Biology Unit 2 Exam Review

Proteins are made up of chains of smaller units called _____.

• Lipids

• Nucleotides

• Amino Acids

• Carbohydrates

How many different amino acids give proteins different structure and functions?

• 2

• 10

• 20

• 50

Which of the following is NOT a function of proteins?

• Catalyzing biochemical reactions

• Providing energy storage

• Serving as structural components

• Acting as signaling molecules

Enzymes, a type of protein, speed up biochemical reactions by _____.

• Consuming reactants

• Lowering activation energy

• Increasing pH

• Inhibiting the process

Carbohydrates are composed of simple sugar units called _____.

• Monomers

• Polymers

• Nucleotides

• Fatty acids

Glucose, fructose, and galactose are examples of _____.

• Monosaccharides

• Polysaccharides

• Nucleotides

• Amino Acids

Carbohydrates contribute to cell structure in the form of _____ in plant cell walls.

• Starch

• Glycogen

• Cellulose

• Sucrose

What is the primary source of energy for cells, especially during high physical activity?

• Proteins

• Fats

• Carbohydrates

• Water

Nucleic acids are made up of nucleotide building blocks. True/False?

What is the function of RNA in protein synthesis?

• RNA carries and stores genetic information

• RNA acts as a structural component

• RNA transmits genetic information from DNA to ribosomes

• RNA catalyzes biochemical reactions