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Biochemistry

In scanning electron microscopy

Biochemistry, Ft Ir Spectroscopy /
Question: In scanning electron microscopy
[A].

a specimen is fixed and then coated with thin layer of a heavy metal

[B].

a specimen is fixed and then coated with transition metal

[C].

a specimen is not fixed and then coated with thin layer of a heavy metal

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

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Biochemistry, Ft Ir Spectroscopy

In immunofluroscence microscopy, fluroscent compounds are attached to

Biochemistry, Ft Ir Spectroscopy /
Question: In immunofluroscence microscopy, fluroscent compounds are attached to
[A].

an antibody specific for the subcellular structure

[B].

an antigen specific for the subcellular structure

[C].

bound antibody specific for the subcellular structure

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

In immunofluroscence microscopy, fluroscent compounds are attached to Read More »

Biochemistry, Ft Ir Spectroscopy

Why is it advantageous to record many FID signals from the same sample and then add them together?

Biochemistry, Ft Ir Spectroscopy /
Question: Why is it advantageous to record many FID signals from the same sample and then add them together?
[A].

To ensure that all target nuclei in the sample have been excited

[B].

To remove inaccuracies caused by fluctuations in the applied magnetic field

[C].

To increase sensitivity

[D].

None of the above

Answer: Option C

Explanation:

No answer description available for this question.

Why is it advantageous to record many FID signals from the same sample and then add them together? Read More »

Biochemistry, Ft Ir Spectroscopy

In FT-NMR, how are nuclei excited?

Biochemistry, Ft Ir Spectroscopy /
Question: In FT-NMR, how are nuclei excited?
[A].

By radio-frequency radiation whose frequency is swept across a predetermined range

[B].

By an intense pulse of radiation which contains a wide range of frequencies

[C].

By an intense pressure

[D].

None of the above

Answer: Option A

Explanation:

No answer description available for this question.

In FT-NMR, how are nuclei excited? Read More »

Biochemistry, Ft Ir Spectroscopy

Enzyme-driven metabolic pathways can be made more efficient by

Biochemistry, Enzymes /
Question: Enzyme-driven metabolic pathways can be made more efficient by
[A].

concentrating enzymes within specific cellular compartments

[B].

grouping enzymes into free-floating, multienzyme complexes

[C].

fixing enzymes into membranes so that they are adjacent to each other

[D].

All of the above

Answer: Option D

Explanation:

No answer description available for this question.

Enzyme-driven metabolic pathways can be made more efficient by Read More »

Biochemistry, Enzymes

In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A —(E1)—> B —(E2)—> C —(E3)—>

Biochemistry, Enzymes /
Question: In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A —(E1)—> B —(E2)—> C —(E3)—>
[A].

A, B, C, and D will all still be produced

[B].

A, B, and C will still be produced, but not D

[C].

A and B will still be produced, but not C or D

[D].

A will still be produced, but not B, C, or D

Answer: Option C

Explanation:

No answer description available for this question.

In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A —(E1)—> B —(E2)—> C —(E3)—> Read More »

Biochemistry, Enzymes

Before they can react, many molecules need to be destabilized. This state is typically achieved through

Biochemistry, Enzymes /
Question: Before they can react, many molecules need to be destabilized. This state is typically achieved through
[A].

changing the three-dimensional shape of the molecule

[B].

oxidizing the molecules by removing electrons

[C].

changing the reaction from a biosynthetic to a catabolic pathway

[D].

the input of a small amount of activation energy

Answer: Option D

Explanation:

No answer description available for this question.

Before they can react, many molecules need to be destabilized. This state is typically achieved through Read More »

Biochemistry, Enzymes

Which of the following statements about enzymes or their function is true?

Biochemistry, Enzymes /
Question: Which of the following statements about enzymes or their function is true?
[A].

Enzymes do not alter the overall change in free energy for a reaction

[B].

Enzymes are proteins whose three-dimensional form is key to their function

[C].

Enzymes speed up reactions by lowering activation energy

[D].

All of the above

Answer: Option D

Explanation:

No answer description available for this question.

Which of the following statements about enzymes or their function is true? Read More »

Biochemistry, Enzymes