SSCG 3803 Quiz 2 (2024)

Which of the following is NOT a type of immunoglobulin domain?

• A) Fab domain

• B) Fc domain

• C) IgG domain

• D) IgM domain

Which of the following is NOT a characteristic of immunoglobulin domains?

• A) They are typically found in proteins involved in the immune response

• B) They are composed of about 70-110 amino acids

• C) They form a β-sheet sandwich structure

• D) They are exclusively found in prokaryotic cells

What is the consequence of HSP47 deficiency in collagen-producing cells?

• A) Increased collagen degradation

• B) Enhanced collagen secretion

• C) Impaired collagen folding and assembly

• D) Accelerated collagen cross-linking

How does the structure of myoglobin facilitate its function of oxygen binding and release?

• A) By forming covalent bonds with oxygen molecules

• B) By having a hydrophobic pocket that interacts with the oxygen molecule

• C) By undergoing a conformational change upon oxygen binding

• D) By increasing its molecular weight upon oxygen binding

Which of the following factors can influence the formation of disulfide bonds in the quaternary structure of the keratin complex?

• A) pH level

• B) Temperature

• C) Presence of reducing agents

• D) All of the above

Collagen's characteristic triple helix structure primarily consists of:

• A) Three β-strands arranged in parallel

• B) Three α-helices twisted around each other

• C) Three β-sheets forming a triangular shape

• D) Three polypeptide chains in a coiled-coil arrangement

Which of the following statements regarding the structure of collagen fibrils is correct?

• A) They are composed of a single collagen molecule

• B) They have a random and disordered arrangement

• C) They are composed of parallel arrays of collagen molecules

• D) They contain high concentrations of elastin

Which of the following accurately describes the "mosaic" component of the fluid mosaic model?

• A) The mosaic pattern formed by lipid droplets on the membrane surface

• B) The presence of various proteins and carbohydrates scattered throughout the lipid bilayer

• C) The organization of phospholipids into a regular, repeating pattern

• D) The arrangement of cholesterol molecules within the membrane

1. The number of times a transmembrane protein crosses the lipid bilayer depends on:

• 1. A) Its molecular weight.

• 1. B) Its overall charge

• 1. C) The presence of disulfide bonds

• 1. D) The number of hydrophobic domains it possesses

What is a potential challenge associated with solubilizing membrane proteins?

• A) They may become too hydrophilic

• B) They may lose their enzymatic activity

• C) They may form stable aggregates

• D) They may become too rigid