BIO 110 PSU EXAM 1 QUESTIONS WITH
ANSWERS 100% CORRECT
anabolism - ANSWER uses energy to consturct components of cells
catabolism - ANSWER breaks down organic matter, for example to harvest energy
hydrogen bonds - ANSWER attraction between partial charges of water
- to other water molecules
-to polar or charged non water molecules
- partial charges act as magnets
individual bonds are weak but over millions of molecules become very strong
surface tension - ANSWER water molecules at the surface are pulled down by hydrogen
bonding with water molecules beneath them
cohesion - ANSWER attraction of water molecules to other water molecules
--hydrogen bonds determine cohesiveness
photosynthesis - ANSWER where does it take place?
-leaves
where does water come from?
, -roots from the ground
how do water molecules move from soil to the leaves?
-transpiration (water moves up narrow tubes with cohesion and adhesion)
why do dogs and people sweat - ANSWER regulates body temperature, specific heat
water has high heat of vaporization
--- evaporative cooling, temperature buffer
when water vaporizes what bonds are broken? - ANSWER hydrogen bonds between
water molecules
how can organisms live on or under the ice? - ANSWER hydrogen bonds expand and
water becomes less dense allowing it to float
-- all have positive and negative partial charges, water molecules lost enerfgy and push
away from each other
--H-bonds have set length
what type of molecules do not dissolve in water? - ANSWER nonpolar, hydrophobic
molecules
--hydrogen and carbon shar electrons better and dont have partial uneven charges
--dont like things that are charged
hydrophobic - ANSWER doesnt like water
ANSWERS 100% CORRECT
anabolism - ANSWER uses energy to consturct components of cells
catabolism - ANSWER breaks down organic matter, for example to harvest energy
hydrogen bonds - ANSWER attraction between partial charges of water
- to other water molecules
-to polar or charged non water molecules
- partial charges act as magnets
individual bonds are weak but over millions of molecules become very strong
surface tension - ANSWER water molecules at the surface are pulled down by hydrogen
bonding with water molecules beneath them
cohesion - ANSWER attraction of water molecules to other water molecules
--hydrogen bonds determine cohesiveness
photosynthesis - ANSWER where does it take place?
-leaves
where does water come from?
, -roots from the ground
how do water molecules move from soil to the leaves?
-transpiration (water moves up narrow tubes with cohesion and adhesion)
why do dogs and people sweat - ANSWER regulates body temperature, specific heat
water has high heat of vaporization
--- evaporative cooling, temperature buffer
when water vaporizes what bonds are broken? - ANSWER hydrogen bonds between
water molecules
how can organisms live on or under the ice? - ANSWER hydrogen bonds expand and
water becomes less dense allowing it to float
-- all have positive and negative partial charges, water molecules lost enerfgy and push
away from each other
--H-bonds have set length
what type of molecules do not dissolve in water? - ANSWER nonpolar, hydrophobic
molecules
--hydrogen and carbon shar electrons better and dont have partial uneven charges
--dont like things that are charged
hydrophobic - ANSWER doesnt like water
