Exam Review- Biology Sem.1-Part 1

What is an independent variable in an experiment?

• variable that the scientist changes to observe if something happens

• variable that changes due to something changed by a scientist

• variable that does not change

• variable that scientists hold dear

What is a dependent variable in an experiment?

• Variable that does not change

• Variable that the scientist changes to observe if anything happens

• Variable that changes as a result of the scientist changing something to observe what happens.

• Variable that only changes when scientists look away from it

What is a control group in an experiment?

• Group tested on in an experiment

• Group that only half get tested in it the experiment

• Group that is NOT tested on and used as a comparison

• Group that does not exist in the experiment

What is a controlled experiment?

• an experiment where no variables are controlled

• an experiment that controls all variables except the one being tested

• an experiment with no variables

• an experiment that test every variable

What are proteins made up of?

• fats

• sugars

• amino acids

• waxes

Which macromolecule can be used to store energy, and includes steroids, fats, oils, and waxes?

• nucleic acids

• carbohydrates

• proteins

• lipids

Changing the temperature or pH can change an enzyme’s ___________.

• nucleotides

• produce

• lipids

• shape

A substance that speeds up the rate of a chemical reaction in living things specifically is called

• an enzyme

• a lipid

• a carbohydrate

• a nucleic acid

What is the name for a chemical unit (building block) that makes up a polymer?

• lipid

• monomer

• carbohydrate

• protein

Which of the following macromolecules is a major food source, or source of energy, for living things and is made up of only carbon, hydrogen, and oxygen atoms (includes starches and sugars)?

• lipid

• protein

• enzyme

• carbohydrate