Sources of Energy
All living things need food for:
a) Energy
b) Materials
c) Energy and materials
C) Energy and materials
Do plants, animals, or both do photosynthesis?
Plants.
Do plants, animals, or both do cellular respiration?
Both
Molecules need to have enough _______in order for a chemical reaction to happen.
Energy
John notices that the chemical reaction only happens when there is an enzyme involved. John made a what?
Observation.
An organism that can create its own food is called...
an autotroph
Do autotrophs, heterotrophs, or both do photosynthesis?
Autotrophs
Do autotrophs, heterotrophs, or both do cellular respiration?
Both
Is many glucose molecules joining together to form glycogen a chemical reaction?
Yes
Based on John's observation that a chemical reaction only happens when an enzyme is involved, he thinks that the enzyme must have helped it happen. John made a/an ...
inference
a) What is a heterotroph?
b) Provide an example
a) an organism that eats other living things
b) many answers
What kind of energy is needed in order for photosynthesis to happen?
Sunlight
What kind of energy does cellular respiration produce?
ATP
How do enzymes help chemical reactions happen?
They reduce the amount of energy needed for the chemical reaction to happen.
John thinks that an enzyme is needed to make a certain chemical reaction happen, but wants to test it out to be sure. John is making a/an...
hypothesis.
Provide an example of a macromolecule that a heterotroph may eat.
Protein, carbohydrate (polysaccharide)
What is a carbohydrate that is one of the molecules that is related to photosynthesis?
Glucose
What is a carbohydrate that is one of the molecules that is related to cellular respiration?
Glucose
a) Explain what a substrate is.
b) Explain what an enzyme is.
a) Enzyme is an ingredient that gets used up in a chemical reaction that involves use of an enzyme.
b) The enzyme helps the chemical reaction happen to the substrate, but the enzyme does not get used up.
John mixes two ingredients into a cup of water to see if they will do a chemical reaction, and he also puts an enzyme in. The chemical reaction happens?
a) Did the enzyme help the chemical reaction happen?
b) Why or why not?
a) We don't know.
b) Unless we also saw if the chemical reaction happens WITHOUT the enzyme, we can't know if the enzyme made a difference.
For both of the following organisms, answer whether they perform photosynthesis, cellular respiration, both, or neither.
a) Autotrophs
b) Heterotrophs
a) Autotrophs-- both
b) Heterotrophs-- cellular respiration only
______ + _______ + _______ --> _______ + ______
_____ + ______ --> _____ + ______ + ______
glucose + oxygen --> water + carbon dioxide + ATP
Think about the reaction:
AB + CD ---> AC + BD
Normally, this has to be 60 degrees to happen. The room is only 40 degrees. We want to make this reaction happen 100 times (there is 100 of AB and 100 of CD).
An enzyme makes it only need to be 40 degrees for the reaction to happen.
a) Will it happen without the enzyme?
b) Will it happen with the enzyme?
c) What will happen if you have ten times as much enzyme?
a) No
b) Yes
c) It will happen faster.
A chemical reaction normally happens at 60 degrees. You want to test out 2 things:
1) If an enzyme helps it happen.
2) If more enzyme makes it go faster.
Design an experiment that will help us test BOTH of these things.
many answers