Exam #2

 

Select the correct multiple answer using one of the keys A, B, C, D or E as follows:

A. 1, 2 and 3 are correct

B. 1 and 3 are correct

C. 2 and 4 are correct

D. only 4 is correct

E. all are correct          

 

1)     During vigorous exercise there is :

1.       Decreased levels of fructose-2,6-bisphosphate

2.       Conversion of pyruvate to lactate

3.       Increased gluconeogenesis

4.       Elevated NAD/NADH+ ratio

2)     Which of the following are epimers?

1.       Glucose and galactose

2.       Fructose and sucrose

3.       Mannose and glucose

4.       Amylose and amylopectin

3)     Which of the following amino acid have aromatic R groups?

1. Phenylalanine

2. Tyrosine

3. Tryptophan

4. Arginine

        4)  Non-competitive inhibiton:

                1. Decreases apparent Vmax

                2. Increases Km

                3. Has no effect on Km

                4. Inhibitors bind to same site as substrate

     5)  The irreversible reactions of the glycolytic pathway are:

                1. glucose to glucose-6-phosphate

                2. fructose-6-phosphate to fructose-1,6-bisphosphate

                3. phosphoenolpyruvate to pyruvate

                4. glyceraldehyde-3-phosphate to dihydroxyacetone phosphate

 

6) Where does the Krebs’ cycle take place?

                1. Nucleus

                2. Golgi apparatus

                3. Peroxisomes

                4. Mitochondria

7) Disulfide bridges may be found in:

                1. histidine

                2. lysine

                3.cysteine

                4. cysteine

8) Alternative fates of pyruvate are:

                1.aggregation in adipose tissue 

2. reduction of pyruvate to ethanol

                3. excreted in the urine

                4. carboxylation of pyruvate to oxaloacetate

9) Examples of substrate level phosphorylation is/are:

                1. formation of 1,3-bisphosphoglycerate

                2. reduction of pyruvate to lactate

                3. conversion of phosphoenolpyruvate to pyruvate

                4. formation of fructose-1,6- bisphosphate

10) The human cell DOES NOT possess

                1. mitochondria

                2. lysosomes

                3. rough ER

                4. cell wall

 

This entry was posted in Exam. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s