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Worksheets

R&W&B&P

Total questions: 40

Worksheet time: 31mins

Name
Class
Date
1.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
2.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
3.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
4.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
5.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
6.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
7.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
8.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
9.

In reactions, products must be equal to..

a)

Products

b)

Reactants

c)

Starters

d)

Enders

10.
The thing that does the dissolving
a)
Solute
b)
Solvent
c)
Colloid
d)
Solution
11.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
12.
The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
13.
Type of mixture in which all substances are evenly distributed is a?
a)
Solution
b)
Solute
c)
Solvent
14.
This is the part of a solution that dissolves
a)
Solute
b)
Solvent
c)
Solution
d)
Mixture 
15.
mixture of two or more substances; dissolved particles are spread evenly throughout the mixture
a)
solvent
b)
solute
c)
mixture
d)
solution
16.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
17.

The measure of concentration of H+ ions in a solution

a)

buffer

b)

base

c)

alkaline

d)

pH

18.

Which is a substance that produces OH- ions when dissolved in water ?

a)

a base

b)

an acid

c)

a buffer

d)

salt

19.

Why are buffers important ?

a)

to keep pH within 6.5 to 7.5

b)

to keep pH within 2.0 to 5.0

c)

to keep pH within 3,5 to 6,5

d)

to keep pH within 7,0 and 8,0

20.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
21.

Carbohydrates ,lipids ,proteins and nucleic acids are

a)

macromolecules

b)

acids

c)

bases

d)

solution

22.

Proteins are made from

a)

monosaccharides

b)

polysaccharides

c)

amino acids

d)

peptide bonds

23.

........make up fats ,oils and waxes

a)

carbohydrates

b)

proteins

c)

nucleic acids

d)

lipids

24.

DNA and RNA are examples of

a)

amino acids

b)

nucleic acids

c)

carbohydrates

d)

proteins

25.

Which joins amino acids together ?

a)

ionic bonds

b)

hydrogen bonds

c)

van der Waals forces

d)

peptide bonds

26.

Which substance is not part of a nucleotide ?

a)

a phosphate

b)

a base

c)

a sugar

d)

water

27.

This is known as

a)

pleated sheet

b)

helix

c)

dipeptide

d)

lipid

28.

Which molecules are a central energy source in organisms?

a)

proteins

b)

lipids

c)

carbohydrates

d)

nucleic acids

29.
A biological polymer made of amino acid monomers is a 
a)
protein
b)
lipid
c)
carbohydrate
d)
nucleic acid
30.

Some proteins are catalysts in chemical reactions, meaning they speed them up. What are these proteins called?

a)

monomers

b)

enzymes

c)

quickens

d)

neutrons

31.

Which type of biological macromolecule is the main component of the plasma membrane?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

32.

Identify a cholesterol molecule

a)

structure A

b)

structure B

c)

structure C

d)

structure D

33.

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

a)

the phosphate "head"

b)

the lipid "tails"

34.

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHILIC?

a)

the phosphate "head"

b)

the lipid "tails"

35.

This describes the two layers of phospholipids that arranged to allow the membrane to exist in a watery environment

a)

phospholipid bilayer

b)

bilipid phospholayer

c)

dilipid phospholayer

d)

diphospholipid layer

36.

In the plasma membrane, cholesterol contributes to the

a)

carrying of carbohydrates

b)

the rigidness of the membrane

c)

carrying of proteins

d)

fluidity of the membrane

37.

Which term describes the phospholipids in the bilayer as a "sea" in which other components move around, forming a pattern or mosaic on the cell surface?

a)

phospholipid bilayer model

b)

fluid mosaic model

c)

cell components model

d)

sea bilayer model

38.

Which characteristic of life best describes the function of the plasma membrane?

a)

composed of one or more cell

b)

grows and develops

c)

passes on genetic information

d)

maintains homeostasis

39.

The plasma membrane forms a _____________ boundary between a cell and its environment

a)

thin and flexible

b)

thick and rigid

c)

thin and rigid

d)

thick and flexible

40.

Which characteristic of the plasma membrane allows some substances to pass through while keeping other out?

a)

selective uptake

b)

selective permeability

c)

selective transport

d)

selective prevention

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