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Unit 1 Test: Intro to Biology

Total questions: 50

Worksheet time: 39mins

Name
Class
Date
1.

A testable explanation of a situation is called a(n) _____________.

a)

Experiment

b)

Data

c)

Hypothesis

d)

Conclusion

2.

_____________ is an explanation of WHY natural phenomena occur and is supported by many observations and experiments over time.

a)

Experiment

b)

Data

c)

Theory

d)

Law

3.

In an experiment, the group exposed to the factor being tested is the ___________.

a)

Experimental group

b)

Control group

4.

Which of the following is a variable that stays the SAME during an experiment?

a)

Constant

b)

Independent variable

c)

Dependent variable

d)

Control Group

5.

Scientific Question: Does playing video games improve reaction time? What is the independent variable?

a)

playing video games

b)

reaction time

c)

type of video game

6.

When you step out into the cold, your body shivers in order to maintain its temperature at 98.6F.

a)

All living things metabolize

b)

All living things have cell structure

c)

All living things maintain homeostasis

d)

All living things grow & develop

7.

The roots of a plant grow towards a source of ground water.

a)

All living things metabolize

b)

All living things reproduce

c)

All living things respond to stimuli

d)

All living things grow & develop

8.

The smallest unit of life that makes up ALL living things is called a (an)_________.

a)

DNA

b)

Cell

c)

Atom

d)

Macromolecule

9.

A group of similar cells that come together to perform a specific function is a/an:

a)

organ

b)

organism

c)

organ system

d)

tissue

10.

A collection of living organisms that belong to different populations, but all live in the same area and interact with one another, is a...

a)

Population

b)

Ecosystem

c)

Community

d)

Ecosphere

11.

Which of the following is NOT a characteristic of all living things?

a)

Homeostasis

b)

Reproduction

c)

Breathing

d)

Growth and development

12.

Type of reproduction that produces two genetically identical offspring from one parent is _________________.

a)

Sexual

b)

Asexual

c)

Reproduction

d)

Homeostasis

13.
A caterpillar hibernates in a cocoon and emerges as a butterfly.
a)

All living things evolve

b)
All living things have a metabolism
c)
All living things respond to their environment
d)
All living things grow and develop
14.

Which type of cell has a nucleus & membrane-bound organelles?

a)

Eukaryotic

b)

Prokaryotic

15.

Which characteristic of life pertains to natural selection (the process by which organisms either adapt to their environment to survive or risk extinction)?

a)

Evolution

b)

Heredity

c)

Reproduction

d)

Metabolism

16.

To which kingdom does this organism belong?

a)

Protist

b)

Plant

c)

Animal

d)

Fungi

17.

All living things or organisms in an ecosystem are:

a)

Biotic factors

b)

Abiotic factors

18.
Water temperature would be an example of ...
a)

a BIOTIC factor.

b)

an ABIOTIC factor.

19.

Which of the following correctly lists the levels of biological organization from LEAST complex to MOST complex?

a)

cell, tissue, organ, organ system, organism

b)

cell organism organ system organ tissue

c)

organ system organism organ tissue cell

d)

organism organ system organ tissue cell

20.

What does the nucleus of an atom contain?

a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
21.

How many VALENCE electrons does this carbon atom have?

a)

2

b)

4

c)

8

22.

Why do chemical bonds form between atoms?

a)

so the number of protons equals the number of electrons

b)

to stabilize atoms and fill the outermost electron level

c)

so an atom can become unstable

23.

Which of the following describes Covalent Bonds?

a)

Bonds form because of opposite charges

b)

Electrons are shared to fill outer electron shells

c)

Electrons are transferred between atoms

24.
This picture shows a...
a)
Ionic Bond
b)
Covalent Bond
c)

Hydrogen Bond

25.
What does "polar" mean?
a)
A molecule is cold
b)
A molecule has ionic bonds
c)
A molecule has covalent bonds
d)
A molecule has areas of positive and negative charge
26.

Which end of the water molecule has a partially positive charge?

a)
the oxygen end
b)
the hydrogen end
27.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
28.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Hydrogen bonds
29.
Water is polar because...
a)

The unequal sharing of electrons gives the water molecule a partial negative charge near its oxygen atom and a partial positive charge near its hydrogen atoms.

b)

The equal sharing of electrons causes oxygen and hydrogen to have neutral charges.

30.
The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
31.

What is the term for water's ability to defy gravity and climb up a tube?

a)

Capillary Action

b)

Specific Heat

c)

Universal Solvent

d)

Magic

32.

Why does ice float?

a)

water expands when it freezes, making ice less dense than water

b)

water compacts when it freezes, making ice more dense than water

c)

hydrogen bonds in water push the ice to the surface

d)

ice is afraid of water, and avoids it

33.

How many bonds will a C atom form?

a)

1

b)

2

c)

3

d)

4

34.
The following figure is illustrating
a)
Dehydration Synthesis
b)
Hydrolysis
35.

Many monomers bond together to form _____________ through the process of ________________________.

a)

dimers, dehydration synthesis

b)

polymers, dehydration synthesis

c)

polymers, hydrolysis

d)

dimers, hydrolysis

36.
What type of macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
37.

Which of the following is the monomer of a lipid?

a)

Polysaccharide

b)

Monosaccharide

c)

Fatty acid

d)

Triglyceride

38.
DNA and RNA are examples of 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
39.
Which of the following molecules make up the basic structure of a cell membrane?
a)
waxes
b)
steroids
c)
fatty acids
d)
phospholipids
40.

The "R" group stands for a different molecule that can be placed to change the amino acid. How many "R" groups are there?

a)

5

b)

10

c)

20

d)

26

41.

Match the disaccharide (carbohydrate) with the appropriate picture.

a)
b)
c)
d)
42.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
43.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
44.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The enzyme’s activity increases as pH increases 5.0 to 9.0
c)
The enzyme’s activity is greater around pH of 8.0 .
45.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction. 
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions. 
46.

Identify Letter C

a)

enzyme

b)

active site

c)

substrate

d)

products

47.

What does an enzyme do to a chemical reaction?

a)

Speeds it up (catalyzes)

b)

Slows it down

48.

Which of the following best defines denature?

a)

An enzyme's shape changes causing it to no longer catalyze reactions.

b)

A substrate's shape changes to match the enzyme

49.

What does an enzyme do to the activation energy needed for a chemical reaction?

a)

Raises Activation Energy

b)

Lowers Activation Energy

50.

Which of the following would NOT denature an enzyme?

a)

Heat

b)

Water

c)

pH

d)

Salt

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