BIO 110 exam 2

BIO 110 exam 2 - BIO 110 EXAM 2 1 Which of the following types of molecules are the MAJOR STRUCTURAL COMPONENT of the cell membrane A Nucleic acids

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 110 EXAM 2 1) Which of the following types of molecules are the MAJOR STRUCTURAL COMPONENT of the cell membrane? A) Nucleic acids and proteins B) Phospholipids and cellulose C) Glycoproteins and cholesterol D) Phospholipids and proteins 2) All of the following statements about membrane structure and functions are true EXCEPT A) Small, lipid soluble molecules are more permeable to membranes than large, water soluble membranes B) Both sides of a membrane are identical in structure and function C) Diffusion, osmosis and facilitated diffusion do not require any energy input from the cell D) Membrane proteins can transport molecules against concentration gradients with input of energy 3) The movement of a substance across a biological membrane against its concentration gradient with the help of energy input is which of the following? A) Osmosis B) Facilitated diffusion C) Exocytosis D) Active transport 4) The sodium potassium pump A) Moves 2 Na ions in, 3 K ions out of the cell B) Moves 2 Na ions out, 3 K ions in to the cell C) Moves 3 Na ions out, 2 K ions into the cell D) Moves 3 Na ions in, 2 K ions out of the cell 5) Water passes more quickly through cell membranes than you would expect by simple diffusion because A) The bilayer is hydrophilic B) A water movement is tied to ATP hydrolysis
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C) It is a small, polar, charged molecule D) It moves through aquaporins in the membranes 6) Which of the following is TRUE regarding catabolic pathways? A) They release energy as they degrade polymers to monomers B) They consume energy to build up polymers from monomers C) They do not depend on enzymes D) They lead to the breakdown of ATP 7) Which of the following would decrease the entropy within a system? A) Hydrolysis B) Respiration C) Dehydration reactions D) Catabolism 8) A chemical reaction that has a POSTIVE ∆G is correctly described as A) Spontaneous B) Endergonic C) Exothermic D) Exergonic 9) Molecules capable of interacting much first overcome a thermodynamic barrier known as the reactions A) Activation energy B) Heat content C) Free energy content D) Entropy
Background image of page 2
10) Why is ATP an important molecule in metabolism? A) Its phosphate bonds are easily broken B) It energizes other molecules by transferring phosphate groups C) Hydrolysis of its phosphate groups is exergonic D) All of the above 11) How can one increase the rate of a chemical reaction? A) Decrease the concentration of reactants B) Add an enzyme C) Decrease the temp of the reaction D) Increase the activation energy 12) Which of these statements regarding enzymes is FALSE ? A) Enzymes are proteins that function as catalysts B) Enzymes decrease the activation energy of a reaction C) The activity of an enzyme can be regulated by the factors in their immediate environment D) An enzyme decreases the free energy of a reaction 13) Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? A) Competitive inhibition
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course BIO 110 taught by Professor Fairchild during the Fall '07 term at West Chester.

Page1 / 11

BIO 110 exam 2 - BIO 110 EXAM 2 1 Which of the following types of molecules are the MAJOR STRUCTURAL COMPONENT of the cell membrane A Nucleic acids

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online