Question 1

When oxygen is bound to the heme group of myoglobin, it is coordinated between _____ and _____.

Accepted Answer

A)  F8 His; Fe3+ of heme 
B)  E7 His; Fe3+ of heme 
C)  F8 His; Fe2+ of heme 
D)  E7 His; Fe2+ of heme 
E)  none of the above 
A)  F8 His; Fe3+ of heme 
B)  E7 His; Fe3+ of heme 
C)  F8 His; Fe2+ of heme 
D)  E7 His; Fe2+ of heme 
E)  none of the above

Question 2

Which of the following fibers is correctly paired with the protein that forms the fiber?

Accepted Answer

A)  microfilaments: actin 
B)  microtubule: tubulin 
C)  extracellular support fibers: collagen 
D)  intermediate filaments: keratin 
E)  all of the above 
A)  microfilaments: actin 
B)  microtubule: tubulin 
C)  extracellular support fibers: collagen 
D)  intermediate filaments: keratin 
E)  all of the above

Question 3

In Hb S, a valine residue binds to a(n) ___ patch causing ___ of the hemoglobin.

Accepted Answer

hydrophobi

Question 4

Which amino acid is critical for crosslinking of keratin fibers?

Accepted Answer

A)  Ser 
B)  Lys 
C)  His 
D)  Cys 
E)  Gln 
A)  Ser 
B)  Lys 
C)  His 
D)  Cys 
E)  Gln

Question 5

Which of the following details the nucleotide-binding site when tubulin dimers assemble into microtubules?

Accepted Answer

A)  both  $\alpha$  and  $\beta$  sites are bound to GTP 
B)  the  $\alpha$  site is bound to GTP; the  $\beta$  site is bound to GDP 
C)  the  $\alpha$  site is bound to GDP; the  $\beta$  site is bound to GTP 
D)  both  $\alpha$  and  $\beta$  sites are bound to GDP 
E)  the  $\alpha$  site is bound to GTP; the  $\beta$  site is unoccupied following GTP hydrolysis and release of GDP 
A)  both  $\alpha$  and  $\beta$  sites are bound to GTP 
B)  the  $\alpha$  site is bound to GTP; the  $\beta$  site is bound to GDP 
C)  the  $\alpha$  site is bound to GDP; the  $\beta$  site is bound to GTP 
D)  both  $\alpha$  and  $\beta$  sites are bound to GDP 
E)  the  $\alpha$  site is bound to GTP; the  $\beta$  site is unoccupied following GTP hydrolysis and release of GDP

Question 6

While the composition of hemoglobin in adult humans is  $\alpha$ 2 $\beta$ 2, in the developing fetus, _____ is observed

Accepted Answer

A)     2    2 
B)   $\alpha$ 2   2 
C)   $\alpha$ 2    2 
D)   $\alpha$ 2     2 
E)   $\alpha$ 2 $\gamma$  2 
A)     2    2 
B)   $\alpha$ 2   2 
C)   $\alpha$ 2    2 
D)   $\alpha$ 2     2 
E)   $\alpha$ 2 $\gamma$  2

When oxygen is bound to the heme group of myoglobin, it is coordinated between _ and _.

Which of the following fibers is correctly paired with the protein that forms the fiber?

In Hb S, a valine residue binds to a(n) _ patch causing _ of the hemoglobin.

Which amino acid is critical for crosslinking of keratin fibers?

Which of the following details the nucleotide-binding site when tubulin dimers assemble into microtubules?

While the composition of hemoglobin in adult humans is $\alpha$ ₂ $\beta$ ₂, in the developing fetus, _____ is observed

The Chemical Basis of Life

Aqueous Chemistry

Nucleic Acid Structure and Function

Protein Structure

How Enzymes Work

Enzyme Kinetics and Inhibition

Lipids and Membranes

Membrane Transport

Signaling

Carbohydrates

Metabolism and Bioenergetics

Glucose Metabolism

The Citric Acid Cycle

Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Nitrogen Metabolism

Regulation of Mammalian Fuel Metabolism

DNA Replication and Repair

Transcription and RNA

Protein Synthesis

Filters

Exam 5: Protein Function

When oxygen is bound to the heme group of myoglobin, it is coordinated between _____ and _____.

Which of the following fibers is correctly paired with the protein that forms the fiber?

In Hb S, a valine residue binds to a(n) ___ patch causing ___ of the hemoglobin.

Which amino acid is critical for crosslinking of keratin fibers?

Which of the following details the nucleotide-binding site when tubulin dimers assemble into microtubules?

While the composition of hemoglobin in adult humans is α\alphaα 2 β\betaβ 2, in the developing fetus, _____ is observed

The Chemical Basis of Life

Aqueous Chemistry

Nucleic Acid Structure and Function

Protein Structure

How Enzymes Work

Enzyme Kinetics and Inhibition

Lipids and Membranes

Membrane Transport

Signaling

Carbohydrates

Metabolism and Bioenergetics

Glucose Metabolism

The Citric Acid Cycle

Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Nitrogen Metabolism

Regulation of Mammalian Fuel Metabolism

DNA Replication and Repair

Transcription and RNA

Protein Synthesis

Filters

When oxygen is bound to the heme group of myoglobin, it is coordinated between _ and _.

In Hb S, a valine residue binds to a(n) _ patch causing _ of the hemoglobin.

While the composition of hemoglobin in adult humans is $\alpha$ ₂ $\beta$ ₂, in the developing fetus, _____ is observed