Exam 1

Question 1

The following is an example of which reaction class?

CH3CH2OH → CH3CHO + H2O

Answer 1

Elimination Reaction

Question 2

The following is an example of which reaction class?

HOOCCH=CHCOOH + H2O → HOOCCH2CH(OH)COOH

Answer 2

Addition Reaction

Question 3

The following is an example of which reaction class?

CH3Br + HSCH2CH(NH2)COOH → CH3SCH2CH(NH2)COOH + Br- + H+

Answer 3

Nucleophilic Substituition

Question 4

The site of aerobic respiration is:

Answer 4

Mitochondria

Question 5

The carbohydrate coat of a cell is called the:

Answer 5

Glycocalyx

Question 6

Which of the following organelles is involved in aerobic metabolism?

Answer 6

Mitchondria

Question 7

Prokaryotic cells lack:

Answer 7

nucleus

Question 8

Nucleus

Answer 8

In eukaryotic cells. Contains the cell’s genetic information and the machinery for converting that information into a code for protein synthesis.

Question 9

Endoplasmic Reticulum

Answer 9

Constitutes more than half a cell’s total membrane. It exists in two forms: rough and smooth. RER, externally studded with ribosomes, is primarily involved in protein synthesis. SER, lacks attached ribosomes, is involved in lipid synthesis, biotransformation, and Ca²⁺.

Question 10

Isoelectric point (pI)

Answer 10

The pH at which an amino acid has no net charge. Calculated by (pK₁ + pK₂)/ 2.

Question 11

Lysosomes

Answer 11

Vesicles that contain acid hydrolase enzymes, proteins that can degrade biopolymers (proteins, carbohydrates, and nucleic acids) and complex lipids.

Question 12

What properties of water explains it’s ability to dissolve acetic acid?

Answer 12

The ability to form hydrogen bonds with the carbonyl and the hydroxyl groups of acetic acid.

Question 13

Two reasons the ability to form hydrogen bonds with other water molecules or with other polar compounds is important .

Answer 13

1) It gives water great cohesion and resistance to vaporization.
2) It allows for solvation of biomoecules which can also form hydrogen bonds.