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WorksheetsBiochemistry Review
Total questions: 55
Worksheet time: 44mins
Which 3 particles make up an atom?
Proton
Nucleus
Electron
Neutron
Which particle is found in the space surrounding the nucleus of an atom?
(a)
If an atom has 15 protons and 16 neutrons, what is the atomic number?
(a)
How many neutrons does Thorium have?
(a)
How many electrons does Neon have? (Just type the number!)
(a)
Which substance is formed by the combination of two or more elements in definite proportions?
Nucleus
Enzyme
Compound
Ion
How many elements are present in the pictured compound?
(a)
How many molecules are in the pictured compound?
(a)
How many atoms are in the pictured compound?
(a)
In which type of bond are electrons shared?
covalent bonds
Ionic bonds
Which type of electrons are used in bonding?
ionic
covalent
valence
Nucleus
What type of ion forms when an atom loses electrons?
Positive
Negative
Neutral
What type of ion forms when an atom gains electrons?
Positive
Negative
Neutral
How many electrons would N-3 have?
(a)
How many electrons would Co+2 have?
(a)
Which statement is not true about covalent bonds?
a single bond shares 2 electrons
a double bond shares 4 electrons
a triple bond shares 8 electrons
Which atom is slightly negative due to the polarity of water?
Oxygen
Hydrogen
The attraction of molecules of the same substance is known as...
cohesion
adhesion
solution
suspension
The attraction of molecules of different substances is known as...
cohesion
adhesion
solution
suspension
A solution is...
a mixture of two or more liquids
an evenly distributed mixture of two or more substances
when one substance is dissolved into another substance
the breaking of chemical bonds
which of the following is an example of a solution?
A mixture of water and undissolved particles
(a)
which of the following are examples of suspensions?
Which are common names of carbohydrates
starches
lipids
sugars
oils
What are monomers of carbohydrates?
polysaccharides
fatty acids
monosaccharides
nucleic acids
Which of the following is the main function of carbohydrates?
the main source of energy for all living things
the energy-storing molecule
carries genetic information
speeds up chemical reactions
Which of the following are examples of lipids?
fats
oils
nucleic acids
sugars
Which of the following are the monomers of lipids?
glycerol molecule
fatty acids
nucleotide
DNA
True or False: The main role of lipids is longer term energy storage
(a)
Which of the following is an example of a protein?
enzyme
glucose
oxygen gas
sucrose
what are the monomers of proteins?
amino acids
nucleic acids
fatty acids
enzymic acid
Which of the following is not a role of proteins?
build tissue like muscle and bone
speed up chemical reactions
pump molecules in and out of cells
store and transmit genetic information
DNA and RNA are examples of....
nucleic acids
amino acids
Lipids
carbohydrates
True or false: The main role of nucleic acids is to carry and store genetic information.
(a)
What is the pH of a neutral substance
(a)
What is the pH or an acid?
less than 7
7
more than 7
What is the pH or a base?
less than 7
7
more than 7
Acid or Base: If a substance has a high concentration of H+ ions (more than water).
(a)
acid or base: If a substance has a low concentration of H+ ions (less than water)
(a)
Use the picture provided to answer the question below:
According to the scale which substances are considered acidic?
Lemons
Vinegar
Ammonia
Banana
Use the picture provided to answer the question below:
According to the scale which substances are considered basic?
Vinegar
drain cleaner
Soap
Baking soda
use the picture to answer the question below:
What is one example of a neutral substance?
(a)
Use the word bank below to best complete the sentence.
Rearranged Destroyed Created Neutralized
In a chemical reaction atoms are (a) .
What process changes one set of chemicals into another set of chemicals?
chemical reaction
dissolving
cohesion
mixing
what is present at the start of a chemical reaction, like the ingredients in cooking.
(a)
The end result of a chemical reaction or the outcome is known as the...
(a)
What are the reactants in the chemical reaction provided?
CH4
2O2
CO2
2H2O
What are the products in the chemical reaction provided?
CH4
2O2
CO2
2H2O
what are the reactants in the given chemical reaction?
hydrogen
oxygen
water
what is the product(s) in the given chemical reaction?
hydrogen
oxygen
water
The energy required to begin a chemical reaction is known as...
activation energy
latent energy
polar energy
bonded energy
Substances that speed up chemical reactions are known as (a) . (Not just for living things)
True or false: Enzymes act as catalysts for living things by speeding up chemical reactions in our cells.
(a)
True or false: Enzymes are unlimited by pH and temperature
(a)
True or false: Enzymes and Catalysts are used up in a chemical reaction
(a)
