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Chemistry of life

Total questions: 63

Worksheet time: 42mins

Name
Class
Date
1.

Which statement about the bonding of carbon atoms is true?

a)

Carbon has the ability to form up to four bonds

b)

Carbon can only form bonds with one other carbon atom.

c)

compounds that contain carbon must contain double bonds

d)

Carbon atoms form ring structures each time they bond

2.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
3.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
4.

A(n) is the building block of matter.

a)

nucleus

b)

atom

c)

proton

d)

electron

5.

An atom becomes negatively charged by

a)

gaining an electron

b)

losing an electron

c)

losing a proton

d)

gaining a neutron

6.

Which organelle is responsible making food (Glucose) using sunlight?

a)

Cell Membrane

b)

Nucleus

c)

Chloroplast

d)

Mitochondria

7.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
8.

A plant’s leaves are green because the color green is _________________back to our eyes.

a)

Absorbed

b)

Reflected

c)

Transmitted

d)

None of the Above

9.

What are the products of photosynthesis?

a)

carbon dioxide and glucose

b)

oxygen and glucose

c)

water and carbon dioxide

d)

oxygen and carbon dioxide

10.

The diagram shows a model of the conversion between ATP and ADP. Which statement is supported by the model?

a)

ATP and ADP do not contain energy

b)

ADP contains more energy than ATP

c)

ATP contains more energy than ADP

d)

ATP and ADP contain the same amount of energy

11.

Changes in temperature and pH can decrease an enzyme’s activity by breaking __________.

a)

amino acids

b)

sulfur-sulfur bonds

c)

hydrogen bonds

d)

peptide bonds

12.

Atoms connected by covalent bonds share ____________.

a)

ionic compounds

b)

pairs of electrons

c)

hydrogen ions

d)

carbon and oxygen

13.

Which of these macromolecules includes sugars and starches?

a)

Proteins

b)

Fatty Acids

c)

Nucleic Acids

d)

Carbohydrates

14.

Which of these is formed when an atom gains or loses electrons?

a)

Element

b)

Ion

c)

Molecules

d)

Compound

15.

How is water a polar molecule?

a)

It has a charge

b)

It contains two hydrogen atoms for each oxygen atom

c)

Different parts of the molecule have slightly different charges

d)

It does not have a charge

16.

How many bonds will a C atom form?

a)

1

b)

2

c)

3

d)

4

17.

Hydrophobic means...

a)

An attraction to water

b)

To fear/dislike water

c)

To like water

18.

Hydrophilic means

a)

An attraction to water

b)

To fear/dislike water

19.

The entire molecule shown is a(n) ____ the part circled in red is a(n) ___.

a)

polymer, macromolecule

b)

polymer, monomer

c)

macromolecule, monomer

d)

monomer, polymer

20.
Breaks up polymers, forming monomers
a)
dehydration synthesis
b)
hydrolysis
21.
The following figure is illustrating
a)
Dehydration Synthesis
b)
Hydrolysis
22.

CHECK ALL THAT APPLY!


The following macromolecules contain Sulfur:

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

23.

Which is NOT a function of proteins?

a)

They provide a hydrophobic membrane

b)

They act as antibodies in the immune system

c)

They make-up structures such as muscles

d)

They regulate cell processes by helping to speed up chemical reactions (enzymes)

24.

This macromolecule provides the genetic code to pass on to offspring and the template to make proteins.

a)

carbs

b)

lipids

c)

proteins

d)

nucleic acids

25.

This image depicts a

a)

monosaccharide

b)

disaccharide

c)

polysaccharide

26.
The building blocks of carbohydrates are?
a)
amino acids
b)
fatty acids
c)
monosaccharides 
d)
nucleotides
27.
The function of nucleic acids, such as DNA are for building proteins and carrying the ___________ info.
a)
genetic
b)
disease fighting 
c)
bone building 
d)
energy
28.
The three main parts of a nucleotide are the sugar, the phosphate group, and the _____________  base.
a)
carbon
b)
oxygen
c)
nitrogen
d)
hydrogen
29.
What are the building blocks for nucleic acids?
a)
monosaccharides 
b)
amino acids
c)
nucleotides
d)
fatty acids
30.
Glycerol and fatty acids combine to form...?
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
31.
Glucose (sugar) is an example of a
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
32.
Which is a Carbohydrate's monomer?
a)
Sugar
b)
Amino acids
c)
Monosacharide
d)
Nucleotide
33.
What type of macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
34.
I am responsible for long term energy storage in mammals.
a)
Protein
b)
Lipid
c)
Carbohydrate
d)
Nucleic Acid
35.

Which macromolecule is shown?

a)

lipid

b)

protein

c)

nucleic acid

d)

carbohydrate

36.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
37.
Which group of biomolecules provide quick energy to organisms?
a)
proteins
b)
carbohydrates
c)
lipids
d)
nucleic acids
38.
Enzymes are..
a)
nucleic acids 
b)
carbohydrates 
c)
lipids 
d)
proteins 
39.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
40.
Proteins are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
41.
RNA and DNA are which type of macromolecules?
a)
carbohydrate
b)
lipid
c)
nucleic acid
d)
protein
42.

Enzymes influence chemical reactions in living systems by ______ .

a)

affecting the rate at which reactions occur

b)

absorbing water released when polymers are formed

c)

providing the substrate required for the reaction to occur

d)

combining with excess hydrogen to form gaseous wastes

43.

Any substance that is acted upon by an enzyme is called a(n) _______ .

a)

Coenzyme

b)

Substrate

c)

Polypeptide

d)

Vitamin

44.

Which chemical is classified as an enzyme?

a)

Galactose

b)

fructose

c)

cellulase

d)

lipid

45.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
46.

What is the optimal pH for this enzyme?

a)

6

b)

10

c)

9

d)

7

47.

The light-independent reactions of photosynthesis need __________.

a)

Oxygen

b)

Water

c)

Carbon dioxide

d)

Cellulose

48.

The function of the light-dependent reactions is to __________.

a)

release carbon dioxide

b)

capture and transfer energy

c)

build sugars

d)

form water molecules

49.

Which of these is the location of the photosystems in the light-dependent reactions of photosynthesis?

a)

cell membrane

b)

Thylakoid membrane

c)

mitochondria

d)

Stroma

50.

Which of these are the products of the light-dependent reactions of photosynthesis that are required by the light-independent reactions?

a)

oxygen and NADPH

b)

oxygen and ATP

c)

ATP and NADPH

d)

water and oxygen

51.

NADPH is important in photosynthesis because it __________.

a)

is needed to form chlorophyll and carotenoids

b)

provides high-energy electrons used to store energy in organic molecules

c)

provides additional oxygen atoms from the breakdown of water molecules

d)

becomes broken down to form NADP

52.

What process that takes place in the mitochondria provides the electron transport chain in cellular respiration with the energy it needs to function?

a)

Krebs cycle

b)

Calvin Cycle

c)

photosystem II

d)

Light-dependent reaction

53.

What happens to the sugars that are made during photosynthesis?

a)

They make ATP by bonding together.

b)

They go back into the Calvin cycle.

c)

They can be used for cellular respiration.

d)

They move directly into an electron transport chain.

54.

The part of cellular respiration that needs oxygen takes place inside the __________.

a)

Thylakoid

b)

Cytoplasm

c)

Nucleus

d)

Mitochondria

55.

Which of these statements is true of ATP?

a)

It contains less stored energy than ADP.

b)

It converts sunlight into chemical energy.

c)

It stores energy for cellular processes.

d)

It stores energy as glucose.

56.

The overall purpose of the Calvin cycle is to _____________.

a)

generate NADP.

b)

generate molecules of ATP.

c)

give off oxygen for animal use.

d)

build sugar molecules.

57.

Most of the atmospheric oxygen occurs as a result of photosynthesis. From which of the following molecules is the oxygen derived?

a)

Water

b)

nitrate

c)

Glucose

d)

Carbon dioxide

58.

The fluid portion of the chloroplast where light-independent reactions occur is called?

a)

Matrix

b)

Stroma

c)

Cytoplasm

d)

Thylakoid

59.

The first stage of cellular respiration, called __________, takes place in the cytoplasm of the cell and needs no oxygen.

a)

Krebs cycle

b)

Glycolysis

c)

Photorespiration

d)

Oxidation

60.

The first stage of cellular respiration, called __________, takes place in the cytoplasm of the cell and needs no oxygen.

a)

Krebs cycle

b)

Glycolysis

c)

Photorespiration

d)

Oxidation

61.

Which stage of cell respiration makes the majority of ATP?

a)

Glycolysis

b)

Krebs cycle

c)

Electron transport chain

d)

Fermentation

62.

How many net ATP are made in glycolysis?

a)

1

b)

2

c)

6

d)

34

63.

How many net ATP are made in cellular respiration?

a)

2

b)

6

c)

30

d)

36

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