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L6 Cell Anatomy: Membrane bound organelles

Mer Scott 8 questions 5.0 (1 rating) Updated 26 Mar 2017

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Questions in this quiz (8)

  1. 1Which is NOT a function of membranes?
    1. ASeparation of incompatible processes
    2. BCreation of concentration gradients
    3. CPackaging for transport
    4. DDigestion of debris
  2. 2Which statements about the plasma membrane are CORRECT?
    1. AIt is a fluid phospholipid bilayer with proteins and other lipids incorporated into it.
    2. BIt is permeable to hydrophobic molecules like steroid hormones.
    3. CIt restricts entry of hydrophilic and ionic (charged) molecules/
    4. DIt is always saturated.
  3. 3Cholesterol acts as a fluidity buffer for the plasma membrane as it makes the phospholipid layer more viscous, but also lowers its solidifying point,
    1. ATrue
    2. BFalse
  4. 4Proteins are unspecific to cell type.
    1. ATrue
    2. BFalse
  5. 5There are two types of transport in regards to energy transfer: passive and active. Passive is from [blank_start]high to low[blank_end] concentration, "[blank_start]down[blank_end]" a gradient. Active is from [blank_start]low to high[blank_end] concentration, "[blank_start]up[blank_end]" a gradient.
    1. Ahigh to low
    2. Bdown
    3. Clow to high
    4. Dup
  6. 6Facilitated diffusion is a form of [blank_start]passive[blank_end] transport where molecules are too large to diffuse through a membrane on their own. Facilitated diffusion involves [blank_start]channels, or carrier proteins[blank_end].
    Channels can be "leak" channels where molecules can [blank_start]freely[blank_end] move, or they can be gated. Voltage-gated channels respond to changes in [blank_start]charge[blank_end] whereas ligand-gated channels respond to [blank_start]chemical signals[blank_end].
    1. Apassive
    2. Bchannels or carrier proteins
    3. Cfreely
    4. Dcharge
    5. Echemical signals
  7. 7Active transport utilises [blank_start]proteins[blank_end] that act as pumps which use [blank_start]ATP[blank_end] to move molecules [blank_start]up[blank_end] a concentration gradient. This is important for maintaining [blank_start]concentration[blank_end] of ions, and can be direct or indirect. A classic example is the [blank_start]sodium-potassium[blank_end] pump.
    1. AATP
    2. Bup
    3. Cconcentration
    4. Dsodium-potassium
    5. Eproteins
  8. 8Which of the following is not a function of proteins?
    1. ASignal transduction
    2. BCell recognition
    3. CLinking of membranes to the cytoskeleton or ECM
    4. DLinking of cells
    5. ELinking of organelles

Information

Description
Objectives: Outline the importance of organelles and sub-cellular compartments • Describe the structure of the plasma membrane and outline its importance to cell function • Outline mechanisms by which substances traverse the plasma membrane
Author
Mer Scott
Language
English
Views
33
History
Created on 26 Mar 2017 · updated on 26 Mar 2017
Rating
5.0 out of 5 · 1 rating
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