Biochem Quizzed

Front 1

Where are the two major sites for glycogen storage in humans

Back 1

Liver and Muscle

Front 2

Which of the following statements regarding glycogen metabolism is FALSE

Back 2

In muscle, glycogen synthesis is activated by Ca2+ ions

Front 3

Which is not a structural feature of cholesterol?

Back 3

Aromatic ring

Front 4

Main function of the pentose phosphate pathway is to:

Back 4

Supply pentose and NADPA

Front 5

Which of the following statements regarding gluconeogenesis is FALSE

Back 5

Gluconeogenesis consumes a net of 1 CO2 molecules

Front 6

Which of the following statements about the pentose phosphate pathway is incorrect

Back 6

It requires the participation of molecular oxygen

Front 7

What is the energetic cost of running the Cori cycle, per glucose molecule?

Back 7

4 ATP equivalents

Front 8

Which of the following types of membrane organizaiton must be due to a transport process?

Back 8

Lipid asymmetry in each leaflet of a bilayer

Front 9

Which fatty acid would have a melting temperature higher than that of palmitic acid (16:0)?

Back 9

Stearic Acid (18:0)

Front 10

Which pair below correctly matches an enzyme with its allosteric activator?

Back 10

pyruvate kinase / ADP

Front 11

tRNA molecules are extensively base-paired and are stabilized by

Back 11

hydrogen bonds and stacking interactions.

Front 12

Fat is a more efficient store of energy than carbohydrate. Which of the following is NOT a factor in this?

Back 12

Fat is catabolized only aerobically; carbohydrate can be catabolized anaerobically.

Front 13

Which of the following amino acids contribute atoms utilized in purine biosynthesis?

Back 13

Asp, Gly, Gln

Front 14

Which of the following statements about zinc fingers is false?

Back 14

Zinc fingers are the predominant DNA-binding motif of restriction enzymes.

Front 15

What is the oxidizing agent that is a product of xanthine oxidase?

Back 15

H2O2

Front 16

Histone H1 binds to a DNA segment called

Back 16

Linker DNA

Front 17

Which of the following forces contributes most significantly to the stabilization of the structure of double-stranded DNA?

Back 17

Base stacking interactions or van der Waals interactions.

Front 18

What evidence can be used to support the contention that Z-DNA has a biological function?

Back 18

A protein has been identified that binds to Z-DNA.

Front 19

During starvation, what is the MAJOR fuel source for the production of ketone bodies?

Back 19

fats stored in adipose tissue.

Front 20

The major site of formation of acetoacetate from fatty acids is:

Back 20

Liver

Front 21

The term rRNA refers to ______ RNA.

Back 21

Ribosomal

Front 22

The presence of proflavin is likely to induce

Back 22

more than one of the above.

Front 23

Pol I synthesizes new DNA with very high fidelity, due to its

Back 23

Proofreading capabilities

Front 24

In prokaryotes, RNA polymerase binds to nucleotide sequences known as ______ that are recognized by the corresponding sigma factor.

Back 24

Promoters

Front 25

Transcriptional activators that can have variable positions and orientations are called

Back 25

Enhancers

Front 26

Which of the following offers the best description of a Pribnow box?

Back 26

An AT-rich sequence located at approximately -10.

Front 27

E. coli leading and lagging strand synthesis takes place at the

Back 27

multisubunit replisome.

Front 28

Which of the following factors mediates splicing?

Back 28

snRNPs

Front 29

DNA is unwound by

Back 29

helicases.

Front 30

Pol I is proteolytically cleaved to yield the ____, which lacks 5??3? exonuclease activity.

Back 30

Klenow fragments