Characteristics of Life
Chemistry of Water
Biochemistry
Enzymes
Cell Membrane & Transport
100
It is the smallest unit of life.
Cell
100
What part of the atom is involved in bonding?
a) protons
b) neutrons
c) electrons
Electrons
100
What are the THREE main biomolecule groups?
Carbs, Lipids, Proteins
100
The main purpose of enzymes is to ____________ a chemical reaction.
Speed up!
100
Draw a picture of a phospholipid bilayer (membrane)
200
Humans eat food to get this characteristic of life
What is energy / metabolism
200
Below is a water molecule. Which end is more negatively charged...AND explain why!
The oxygen end is more negatively charged because it has more electrons surrounding it.
200
What is the difference between MONOMERS and POLYMERS
Monomers are the building blocks and polymers are made of a chain of monomers
200
What happens when an enzyme becomes denatured?
It becomes deformed and can not do its job
200
Which of the following passes easily through a cell membrane?
a) large salt ion
b) small nonpolar molecule
b) small nonpolar molecule
300
Give an example of something that is BIOTIC and something that is ABIOTIC.
BIOTIC = Living..... humans, trees, fish...
ABIOTIC = non-living..... rocks, air, water
300
What is an H-bond?
Is it strong or weak?
attraction between two water molecules (because they are POLAR.)
Weak
300
What is the function of:
Carbohydates?
Lipids?
Proteins?
Carbs --> short term energy
Lipids --> long term energy, insulation
Proteins --> transport, build muscles
300
Draw a picture of an enzyme with an INHIBITOR.
300
Facilitated diffusion requires a _____________ channel.
Protein
400
Ancient small horses over time became larger modern horses. What characteristic of life is that?
Groups of living things change over time (evolve).
400
What is the difference between cohesion and adhesion?
cohesion --> water molecules attracted to each other
adhesion --> water molecules attracted to another polar molecule
400
What element do PROTEINS have that Carbs and Lipids do not have?
NITROGEN
400
What is the difference between LACTOSE and LACTASE?
Lactase is the ENZYME that breaks down Lactose
400
Active transport requires energy called __________.
ATP
500
What is homeostasis?
Maintaining stable internal conditions
500
Is wax paper polar or nonpolar? How do you know?
Nonpolar. The water is not attracted to the wax and so the water attracts itself into a ball.
500
How can you tell the difference between a carbohydrate monomer and a Lipid monomer
carb --> ring shape
lipid --> chain
500
List 2 things that can SPEED up an enzyme reaction.
pH
Temperature
500
Active transport moves molecules from LOW to HIGH concentration.... while simple diffusion moves molecules from HIGH to LOW concentration
Is the statement above: TRUE or FALSE
TRUE