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BIO235 Exam Questions With Verified Answers 2024/2025

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BIO235 Exam Questions With Verified Answers 2024/2025 what do cell membranes do? keep the good in, the bad out, and regulate traffic what does a phospholipid consist of? hydrophobic tails and hydrophilic heads what do channel proteins do? create gates for moving materials across this ...

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  • May 17, 2024
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BIO235 Exam Questions With Verified
Answers 2024/2025
what do cell membranes do?
keep the good in, the bad out, and regulate traffic


what does a phospholipid consist of?
hydrophobic tails and hydrophilic heads


what do channel proteins do?
create gates for moving materials across this membrane


what are the types of transportation across membranes?
-passive transport
-active transport


passive transport moves from ____ to ______
High to Low


describes passive transport
-moves down the gradient
-high to low
-no energy needed


active transport moves from ___ to ____
Low to High


describe active transport
-moves up the gradient
-low to high
-requires more energy


what us a negative feedback loop?
counteraction of an effect by its own influence on the process giving rise to it


what us an example pf a negative of a negative feedback loop?
menstrual cycle


What is an example of positive feedback loop?
Pregnancy


Describe a positive feedback loop?
-sometimes does not shut off
-enhancement or amplification of an effect by its own influence on the process giving rise to it

, Describe a negative feedback loop
Counter action of an effect by its own influence on the process giving rise to it


Describe the process of negative feedback loop
Stimulus - sensor - control - effector


What are carbohydrates?
The sugars we need for energy


Monosaccharides are ....
-simple sugars
-1 monomer


Example of a monosaccharide
Glucose


What are disaccharides?
-More complex sugars
-2 monomers


example of disaccharide
Lactose


What is a polysaccharide?
-Consists of the most complex sugars
-3+ monomers


Describe lipids
-a hydrocarbon compound that is hydrophobic
-the basis for fats in the body


What is a triglycerides
-most common dietary lipid group
-commonly referred to directly as "fat" (ex: dairy)


Important roles of protein :
-enzymes
-hormones
-transport
-muscle contraction
-defense
-structure


What are nucleotides?
Highly specialized organic compounds consisting of a phosphate group, a sugar and a nitrogenous
base

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