When enzymes react with a substrate

the enzyme is able to be used again and again.

ATP is a molecule used

All of these answers are correct.

The results of an experiment are statistically significant if

the standard error bars do not overlap.

According to the cell theory

All cells arise from pre-existing cells.

Enzymes in the cell are

reused over and over after completing their task.

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Unit One Review

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Ch 1-6

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Questions 15

Answers

1
Which of the following are the monomers for creating a polysaccharides?
amino acids
glucose
proteins
fatty acids
2
When enzymes react with a substrate
the enzyme will break apart when finished reacting.
the substrate is unchanged.
the enzyme loses its active site
the enzyme is able to be used again and again.
3
Osmosis is the movement of ______ across a selectively permeable membrane.
water
proteins
a small molecule, like calcium.
oxygen
4
Sodium (Na) has a mass # of 23, atomic # of 11, what is the number of electrons?
depends on the group #
11
23
12
5
In a controlled experiment, which of the following should be tested, or manipulated?
the controlled variables
independent variable
dependent variable
control
6
The dehydration reaction occurs when water
is added to a monomer.
is removed from monomers.
is removed from a polymer.
is added to a polymer.
7
What type of chemical is used to maintain the pH of a solution?
pH-balanced solution.
a buffer.
a neutral one.
a biochemical.
8
ATP is a molecule used
for muscle contractions.
to aide in active transport across the membrane.
All of these answers are correct.
for energy needed in reactions.
9
The results of an experiment are statistically significant if
standard errors bars are very large.
the averages are all the same.
the sample size is small.
the standard error bars do not overlap.
10
A hypertonic solution will cause red blood cells to
lose water and shrivel.
gain water and explode.
lose water and then gain a lot of water.
not to change because it is isotonic.
11
Homeostasis is the process of maintaining
a balance of cells in the body.
a nice home!
the same number of cells throughout life.
a stable internal environment.
12
Which organelle is associated with energy-related reactions?
mitochondrion
endoplasmic reticulum
lysosomes
nucleus
13
According to the cell theory
Atoms are the basic unit of living things.
All cells arise from pre-existing cells.
All bacteria and some viruses are living.
14
Enzymes in the cell are
made of carbohydrates.
used up at the end of the reaction.
reused over and over after completing their task.
denatured when they work well.
15
Which organelle is the site of protein synthesis?
Golgi Apparatus
endoplasmic reticulum
ribosomes
mitochondria

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