Concentration gradient Study guides, Class notes & Summaries
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Bio 1201 gregg Exam 2 (100% correct and graded A+)
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transport proteins - are responsible for controlling passage across the membrane 
fluid mosaic model - The membrane is a mosaic of protein molecules bobbing in a fluid bilayer of 
phospholipids 
fatty acid tails - nonpolar, hydrophobic 
fatty acid heads - hydrophilic, polar 
periphial proteins - bound to the surface of the membrane 
integral proteins - penetrate the hydrophobic core (ones that span the membrane are 
transmembrane protiens 
How do cells recognize each other? - by binding to molec...
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BIOD 171 Portage Learning Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 Update
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BIOD 171 Portage Learning Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 UpdatePortage Learning BIOD 171 Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 Update 
 
True or False: A virus is considered a microorganism. 
False. Viruses are not living and as such are not considered microorganisms. Viruses can, however, be classified as microbes, a more general term that includes microorganisms and viruses. 
 
1.	What is the smallest biological unit of life? 
A cell. ...
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Rutgers Murphy Biochem Exam 2 Fully Solved Solution
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Membrane remodeling 
Requires phospholipases 
Requires acyl transferases 
Occurs only when cells are under stress 
Correct! Both A and B are correct 
All of the above are correct 
Both A and B are correct 
In simple diffusion a solute 
Is propelled by random molecular motion 
Moves up its concentration gradient 
Moves across a membrane because of an input of free energy. 
Both A and B are correct 
All of the above are correct 
Is propelled by random molecular motion
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PATHOPHYSIOLOGY 9TH EDITION MCCANCE TEST BANK 2023.
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PATHOPHYSIOLOGY 9TH EDITION MCCANCE TEST BANK 2023. 
Chapter 1: Cellular Biology 
MULTIPLE CHOICE 
1. Which statement best describes the cellular function of metabolic absorption? 
a. Cells can produce proteins. c. Cells can take in and use nutrients. 
b. Cells can secrete digestive enzymes. d. Cells can synthesize fats. 
ANS: C 
In metabolic absorption, all cells take in and use nutrients and other substances from their 
surroundings. The remaining options are not inclusive in their description...
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Hemo Dialysis Bonnet Exam With 100% Correct Answers 2023
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Hemo Dialysis Bonnet Exam With 100% Correct Answers 2023 
Osmosis 
movement of fluid across a semipermeable membrane from an area of lower concentration to higher concentration 
 
 
 
Diffusion 
movement of dissolved particles across a semipermeable membrane from an area of higher concentration to lower concentration 
 
 
 
Ultrafiltration 
water is removed from blood because there is pressure gradient across the membrane 
 
 
 
Ultrafiltration Rate 
The rate at which fluid moves from blood into...
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PATHO- NURS 8022 EXAM 1 QUESTIONS & ANSWERS (2023/2024)(VERIFIED ANSWERS)
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PATHO- NURS 8022 EXAM 1 QUESTIONS & ANSWERS (2023/2024)(VERIFIED ANSWERS)EXAM 1 PATHO- NURS 8022 QUESTIONS & ANSWERS 
(2023/2024)(VERIFIED ANSWERS) 
Negative Feedback 
 - ANSWER Promotes stability; cancels out the original response. Ex: High FSBS, increased insulin by the 
pancreas 
Positive Feedback 
 - ANSWER Promotes a change in one direction; instability, DISEASE. Ex: Blood clotting, platelet cascade 
Proteins 
 - ANSWER Provide selectivity to a membrane 
Integral proteins 
 - ANSWER channel...
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ECPI Final Exam Bio 112 questions with correct answers
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Osmosis is the movement of Answer water through a selectively permeable membrane down its concentration gradient 
 
The ability of an organism to sense and react to changes in its body illustrates Answer responsiveness 
 
In negative feedback mechanisms, changes away from the normal state Answer stimulate changes in the opposite direction to restore normal levels 
 
Which of the following are living organisms simplest unit? Answer cells 
 
An organic compound always contains Answer carbon and hy...
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HMX Biochemistry exam 2023 with 100% correct answer
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synthesis 
ATP synthase couple the exergonic movement of H+ ions down a concentration gradient to the endergonic _______ of ATP from ADP and Pi 
 
 
 
outer and inner 
Mitochondria has 2 membranes: ________ 
 
 
 
unfavorable 
Reaction with a positive change in free energy are thermodynamically 
 
 
 
favorable 
reaction with a negative free energy(G) are thermodynamically 
 
 
 
Energy 
ability to do work 
 
 
 
coordinate diagram 
Change in the free energy of molecules in chemical reaction can...
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BIOL 1P91 Final Exam Questions And Verified Solutions
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BIOL 1P91 Final Exam Questions And Verified Solutions 
What are the 3 general components that make up an atom? - ANS Protons 
Neutrons 
Electrons 
 
The sum of the atomic number and the number of neutrons is: - ANS A (the atomic number) 
Mass Number 
 
Which of the following is/ are a polar bond? 
A) O-H bond in water * 
B) C-O in CO2 
C) N-N in N2 
D) all of the above 
E) two of the above - ANS A) O-H bond in water 
 
A substance dissolvable in oil is said to be: - ANS Hydrophobic...
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Hemo Dialysis Bonnet Exam With 100%Correct Answers 2023.
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Hemo Dialysis Bonnet Exam With 100%Correct Answers 2023. 
Osmosis - answer movement of fluid across a semipermeable membrane from an area of lower concentration 
to higher concentration 
Diffusion - answer movement of dissolved particles across a semipermeable membrane from an area of higher 
concentration to lower concentration 
Ultrafiltration - answer water is removed from blood because there is pressure gradient across the membrane 
Ultrafiltration Rate - answer The rate at which fluid moves...
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LSU Bio 1201 exam 2 Questions With 100% Correct Answers.
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why are membranes called phospholipid bilayers? - Answer-phospholipids have hydrophilic head and 
hydrophobic tail, hydrophobic face inside of cell making 2 layers 
what is meant by fluid mosaic? - Answer-Mosaic of proteins drifting laterally in fluid bilayer of 
phospholipids 
how are membranes adjusted for different temperatures? - Answer-membrane fluidity adjusted by 
changing the ratio of unsaturated to saturated fatty acids 
how do the relative amounts of saturated and unsaturated fats chan...
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