L7 The Endomembrane System

Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott almost 4 years ago
230
2

Description

Objectives: • Define what is meant by the endomembrane system • Describe the function of the endomembrane system • Outline the process of exocytosis and endocytosis

Resource summary

Question 1

Question
Which statement about the smooth endoplasmic reticulum is INCORRECT?
Answer
  • The sER metabolises carbohydrates.
  • The sER synthesizes lipids.
  • The sER detoxifies drugs and poisons (non-nutritional chemicals).
  • The sER stores calcium.
  • The sER synthesizes proteins.

Question 2

Question
The amount of sER can increase or decrease according to a cell's demands.
Answer
  • True
  • False

Question 3

Question
The rough endoplasmic reticulum contains [blank_start]ribosomes[blank_end], and is the site of most [blank_start]protein[blank_end] synthesis. It also stores protein in the lumen, its [blank_start]interior[blank_end].
Answer
  • ribosomes
  • nucleic acid
  • protein
  • lipid
  • interior
  • exterior

Question 4

Question
Synthesis of cytoplasmic proteins occurs in the rER.
Answer
  • True
  • False

Question 5

Question
Which statement about the Golgi is NOT correct?
Answer
  • The Golgi has polarity, and is responsible for processing proteins from the rER.
  • The Golgi glycosolates proteins (adds sugars) and modifies simple carbohydrates to make complex carbohydrates.
  • Vesicles tagged for the plasma membrane exit the trans side of the Golgi.
  • Proteins destined to return to the rER to maintain its structure leave the Golgi in vesicles via the cis face.

Question 6

Question
The Golgi tags proteins so they are directed to the proper vesicle, and then tags those vesicles to direct them to the correct target compartment.
Answer
  • True
  • False

Question 7

Question
There are two pathways from the Golgi out of the cell. These [blank_start]exocytosis[blank_end] pathways can be continuous and unregulated, or "[blank_start]Constitutive[blank_end]" pathways (e.g. proteins transported to the ECM) or they can be "[blank_start]Regulated[blank_end]" pathways, for example the release of [blank_start]hormones[blank_end].
Answer
  • exocytosis
  • Constitutive
  • Regulated
  • hormones

Question 8

Question
[blank_start]Phagocytosi[blank_end]s is a type of endocytosis which is selective, and uptakes "food" to "eat". [blank_start]Pinocytosis[blank_end] however is the non-selective uptake of solutes. Endocytosis can also uptake [blank_start]very specific[blank_end] molecules via [blank_start]receptor mediated[blank_end] endocytosis. All of these pathways join their vesicles with [blank_start]lysosomes[blank_end] for digestion.
Answer
  • Phagocytosis
  • Pinocytosis
  • very specific
  • receptor mediated
  • lysosomes
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