Exam 1

Question 1

The concentration of potassium [K]+ is:
A. Higher inside than outside the cell?
B. Equal between the inside and outside of the cell?
C. Higher outside than inside the cell?

Answer 1

A. Higher inside than outside the cell?

Question 2

The concentration of potassium [Na]+ is:
A. Higher inside than outside the cell?
B. Equal between the inside and outside of the cell?
C. Higher outside than inside the cell?

Answer 2

C. Higher outside than inside the cell?

Question 3

PVT TIM HALL

Answer 3

Phenylalanine, Valine, Threonine, Tryptophan, Isoleucine, Methionine, Histidine, Arginine, Lysine, Leucine

Question 4

Hydrophobic Amino Acids

Answer 4

Phenylalanine, Valine, Tryptophan, Isoleucine, Methionine, Leucine, Proline, Alanine

Question 5

Basic Amino Acids (Positively Charged)

Answer 5

Histidine, Arginine, Lysine

Question 6

Acidic Amino Acids (Negatively Charged)

Answer 6

Aspartic Acid, Glutamic Acid

Question 7

Hydrophilic Amino Acids

Answer 7

Alanine, Cysteine, Glutamine, Glycine, Serine, Tyrosine, Threonine

Question 8

Which is in the body?

Answer 8

D-sugars and L-amino acids

Question 9

CORN

Answer 9

-Start will the carbon, then carbonyl, COOH then R-group and lastly amine. L is clockwise and D is counter clockwise

Question 10

Which drug is more hydrophobic?

Answer 10

The drug with more benzene rings

Question 11

pH+ pOH=

Answer 11

14

Question 12

Nucelophiles

Answer 12

• Electron Rich

- Wants to give away electrons

Question 13

Electrophiles

Answer 13

• Electron poor

- Wants electrons

Question 14

Covalent Bonds

Answer 14

• Strongest bonds

- Sharing of electrons between atoms

Question 15

Hydrogen Bonds

Answer 15

• A bond between a Hydrogen molecule and a molecule of N, F or O

Question 16

Hemoglobin is composed of 4-subunits? This structure is

Answer 16

Quaternary

Question 17

Plasma membranes are often
A. Acetylated
B. Glycosylated
C. Ubiquitined

Answer 17

B. Glycosylated

Question 18

Which of the following enzymes is targeted by statins (cholesterol lowering drugs)?

A. HMG-CoA reductase

B. Acetyl-transferase

C. Fatty-acyl-CoA reductase

D. Glycogen phosphorylase

Answer 18

A. HMG-CoA reductase

Question 19

Polyunsaturated fatty acids have:
A. one double bond.
B. more than one double bond.
C. no double bonds.

Answer 19

B. more than one double bond

Question 20

Please select the correct answer. During glycolysis, 1 molecule of glucose produces.

A. 1 molecule of pyruvate

B. 2 molecules of pyruvate

C. 3 molecules of pyruvate

D. 4 molecules of pyruvate

Answer 20

B. 2 molecules of pyruvate

Question 21

The drug prednisone is a corticosteroid that is used to treat many inflammatory diseases including asthma. Which of the following statements is true? The lipid bi-layer permeability coefficient of prednisone is:

A. Equal to that of Na+?
B. Lower than that of Na+?
C. Higher than that of Na+?

Answer 21

C. Higher than that of Na+?

Corticosteroids are amphiphilic so it’s both hydrophilic and hydrophobic so it can pass through the membrane. The permeability is higher than Na+ bc since its charged it cant pass through the membrane without a transporter

Question 22

Synthesis of a new DNA strand is written in which of the following direction? Please select the correct answer.

A. 3’ to 3’

B. 5’ to 3’

C. 3’ to 5’

D. 5’ to 5’

Answer 22

B. 5’ to 3’

You read from 5’ to 3’. You write from 3’ to 5’

Question 23

Which are Purines?

Answer 23

Purines have two rings. Adenosine and Guanosine

Question 24

Which are Pyrimidines?

Answer 24

Pyrimidines have one ring. Cytosine, Thymidine and Uritidine

Question 25

What would be the anticodon for the start codon AUU?

Answer 25

AUU

Question 26

Which of the following statement about RNA polymerase complex is correct? RNA polymerase:

A. binds to the promoter region on the DNA strand.
B. participates in mRNA transcription.
C. participates in mRNA elongation.
D. participates in mRNA splicing

Answer 26

A. binds to the promoter region on the DNA strand.
B. participates in mRNA transcription.
C. participates in mRNA elongation.

RNA Polymerase does NOT participate in mRNA splicing

Question 27

Which RNA strand is produced by the following DNA:

5’ CAGTTAAGCAGAT 3’

A. 5’ GUCAAUCGUCUA 3’

B. 5’ GTCAATTCGTCTA 3’

C. 5’ TAGACGAATTGAC 3’

D. 5’ AUCUGCUUAACUG 3’

Answer 27

D. 5’ AUCUGCUUAACUG 3’

You have to read it from 3’ to 5’. Then translate it