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MCQs

Protoplasms And Tissues, Cytoplasmic Membrane Systems, Tissues

Total Questions : 143 | Page 13 of 15 pages
Question 121. In mammalian cells, the signal recognition particle (SRP) consists of ____ distinct polypeptides and one small RNA molecule.
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Answer: (c).6
Question 122. Which of the following enzyme present in the rough endoplasmic reticulum removes the signal sequence from nascent polypeptides?
  1.    signal oxidase
  2.    signal peptidase
  3.    olisaccharyltransferase
  4.    luciferase
 Discuss Question
Answer: Option B. -> signal peptidase
Answer: (b).signal peptidase
Question 123. Translocon is a ____________
  1.    polypeptide
  2.    protein channel
  3.    receptor
  4.    recognition particle
 Discuss Question
Answer: Option B. -> protein channel
Answer: (b).protein channel
Question 124. Retrieval signals, present on the C-terminus of ER resident proteins are captured by the receptors present on __________________
  1.    Clathrin-coated vesicles
  2.    Golgi complex
  3.    COPI-coated vesicles
  4.    COPII-coated vesicles
 Discuss Question
Answer: Option C. -> COPI-coated vesicles
Answer: (c).COPI-coated vesicles
Question 125. T-SNAREs are present on the _____________________
  1.    budding vesicle
  2.    transportation material
  3.    target compartment
  4.    tethering proteins
 Discuss Question
Answer: Option C. -> target compartment
Answer: (c).target compartment
Question 126. Which state of the ‘Rabs’ is the active state?
  1.    GDP-bound
  2.    GTP-bound
  3.    Membrane-bound
  4.    Lipid-bound
 Discuss Question
Answer: Option B. -> GTP-bound
Answer: (b).GTP-bound
Question 127. GTP-bound ‘Rabs’ (G-proteins) associated with membranes by a __________ anchor.
  1.    lipid
  2.    protein
  3.    carbohydrate
  4.    ribonucleic acid
 Discuss Question
Answer: Option A. -> lipid
Answer: (a).lipid
Question 128. Clathrin present on the clathrin-coated vesicles is a ______________
  1.    carbohydrate
  2.    protein
  3.    oligosaccharide
  4.    enzyme
 Discuss Question
Answer: Option B. -> protein
Answer: (b).protein
Question 129. A molecule of clathrin has a ______________ structure.
  1.    triskelion
  2.    spherical
  3.    cylindrical
  4.    polygonal
 Discuss Question
Answer: Option A. -> triskelion
Answer: (a).triskelion
Question 130. Dynamin is a _____________________
  1.    adaptor molecule
  2.    accessory protein
  3.    integral membrane protein
  4.    phospholipids
 Discuss Question
Answer: Option B. -> accessory protein
Answer: (b).accessory protein

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