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Cell Biology

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Bachelors Degree Biology Quiz on Cell Biology, created by isabela.merelles on 13/04/2016.
isabela.merelles
Quiz by isabela.merelles, updated more than 1 year ago
isabela.merelles
Created by isabela.merelles almost 9 years ago
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Resource summary

Question 1

Question
Which of the major types of membrane proteins are bound to the surface of the membrane?
Answer
  • Integral proteins.
  • Carrier proteins.
  • Peripheral proteins.
  • Channel proteins.
  • Receptor proteins.

Question 2

Question
Systems that have energy added to them or energy removed from them are best described as which one of the following:
Answer
  • Open systems.
  • Closed systems.
  • Energy depositing systems.
  • Energy releasing systems.
  • None of the above.

Question 3

Question
Which of the following dictate the size and shape of erythrocytes?
Answer
  • Interactions with other cells in the vascular system.
  • The biological functions / roles of those erythrocytes
  • The intracellular content of those erythrocytes.
  • The size and shape of the parent (stem) cells from which those erythrocytes arise.
  • The size of the vascular system around which those cells must circulate.

Question 4

Question
Why does the composition of extracellular fluid differ from that of intracellular fluids?
Answer
  • Because ions are unable to cross the plasma membrane
  • Because the plasma membrane is freely permeable to all molecules.
  • Because the plasma membrane is impermeable to water.
  • Because the plasma membrane offers an impermeable barrier to all solutes.
  • Because the plasma membrane is selectively permeable to particular solutes.

Question 5

Question
Phospholipids can move within the plane of the membrane. Which of the following type of movement rarely occurs?
Answer
  • Lateral Diffusion (Exchanging places with a molecule within the same monolayer).
  • Rotation along their axis.
  • Flip-flop (Exchanging places with lipids in the other monolayer of a bilayer).
  • Flexion.
  • All the above

Question 6

Question
Oxidation and reduction occur simultaneously
Answer
  • True
  • False

Question 7

Question
What are Photoautotrophos?
Answer
  • Organisms that use light energy to synthesise organic molecules from CO2
  • Organisms which use energy from photons of light
  • Organisms that useenergy from light energy and organic substrate
  • Organisms which use energy derived from chemical bonds
  • All the above

Question 8

Question
Some enzyme-catalyzed reactions cease completely if their enzyme is absent
Answer
  • True
  • False

Question 9

Question
The rule that oxidation release energy, whereas reductions require energy input, applies to all chemical reactions, not just those that occur in living cells.
Answer
  • True
  • False

Question 10

Question
Some cells adjust their membrane [blank_start]fluidity[blank_end] by modifying the lipid composition of their membranes
Answer
  • fluidity

Question 11

Question
The value of ΔH for a reaction is positive, therefore that reaction is catabolic.
Answer
  • True
  • False

Question 12

Question
Which of the following properties causes phospholipid molecules to form self-sealing, membrane bilayers when placed in water?
Answer
  • Phospholipid molecules are hydrocarbons
  • Phospholipid molecules are hydrophylic
  • Phospholipid molecules are hydrophobic
  • Phospholipid molecules are amphipathic
  • Phospholipid molecules are bipolar

Question 13

Question
Who pioneered the microscope?
Answer
  • Matthias Scheldien
  • Theodor Schawann
  • Anton van Leeuwenhoek
  • Rudolf Virchopw
  • Robert Hooke

Question 14

Question
Which option below is a type of prokaryote morphology?
Answer
  • Cocci (spherical)
  • Bacillus (rods/rod-like)
  • Spirochetes (spiral)
  • Vibrio ("commas"/curved rods)
  • All the above

Question 15

Question
Which of the following statements is incorrect?
Answer
  • Nuclei and mitochondria are surrounded by a double membrane
  • Hereditary information of a cell is passed on by its proteins
  • Lysosomes and peroxisomes are the site of degradation of unwanted material
  • Bacterial DNA is found in the cystosol

Question 16

Question
In the cytoskeleton, microtubules are composed of which of the following subunits?
Answer
  • Motor proteins
  • Alpha tubulin and beta tubulin
  • Kinesin
  • Dynein
  • Oligomers

Question 17

Question
Which of the following terms applies to cell-cell communication between adjacent cells and is dependent on physical cell-cell contact?
Answer
  • Autocrine
  • Endocrine
  • Intracrine
  • Juxtacrine
  • Paracrine

Question 18

Question
What technique below is not used to visualise the cytoskeleton?
Answer
  • Fluorescence microscopy
  • Live cell fluorescence microcospy
  • Computer-enhanced digital videaomucroscopy
  • Light microscopy
  • Electron microscopy

Question 19

Question
Which of the following membrane proteins penetrate the hydrophobic interior of the lipid bilayer?
Answer
  • Integral proteins
  • Peripheral proteins
  • Channel proteins
  • Carrier proteins
  • Receptor proteins

Question 20

Question
When G < 0, the reaction is exergonic. Which of the following statements is correct in relation to such reactions?
Answer
  • They can proceed forward and can occur spontaneously
  • They cannot occur spontaneously
  • They measure the thermodynamic spontaneity
  • They need energy to proceed
  • None of the above

Question 21

Question
Which one of the following statements is correct in relation to enzyme inhibition?
Answer
  • Enzyme inhibition is always irreversible
  • Reversible inhibition can be competitive and non-competitive
  • Enzyme inhibitors cannot be used as therapeutic agents
  • In non- competitive inhibition, the inhibitor competes with the substrate for the same binding site on the enzyme
  • None of the above
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