WorksheetsChemistry of Life Test
Total questions: 20
Worksheet time: 11mins
The atomic number of an element is defined as the number of
protons
neutrons
electrons
atoms
An atom of phosphorous contains
protons
neutrons
electrons
protons, neutrons, and electrons
All of the statements are true about carbon EXCEPT
A carbon atom typically has 4 valence electrons.
One carbon atom can form up to 4 covalent bonds
Carbon forms ionic bonds with hydrogen atoms.
Carbon forms a wide variety of organic compounds.
A carbon atoms can bond to other atoms to form long chains.
Elements are substances composed of a single type of
compound
molecule
ion
protein
atom
A sodium atom loses an electron to form Na+. Na+ is
an atom
an isotope
a covalent charge
an ion
Which of the following chemical terms include all the others?
molecule
element
polymer
nucleus
atom
Each of the following exists as a molecule EXCEPT
Fe
H2O
C6H12O6
O2
CO2
Human blood is slightly more basic than pure water. Which of the following would best represent the pH for human blood?
pH 2
pH 6.5
pH 7
pH 7.3
pH 12
A carbon atom shares electrons with 2 oxygen atoms to form carbon dioxide. This type of bonding is best described as
ionic
hydrogen
hydrophobic
covalent
The movement of water upward from the roots to the stems, and to the leaves, is partially due to which property of water?
cohesion
high specific heat
high heat of vaporization
less dense as a solid
Substrates bind to enzymes at the
active site
allosteric site
substrate
Enzymes are
carbohydrates
nucleic acids
lipids
proteins
The work of proteins as enzymes can be disrupted by
competitive inhibitors
non-competitive inhibitors
both a and b
none of the above
This process breaks down complex molecules and releases energy
catabolism
anabolism
competitive inhibition
non-competitive inhibition
This process builds molecules from complex molecules from simple molecules and uses energy
catabolism
anabolism
competitive inhibition
non-competitive inhibition
Jenny soaked filter paper disks in a catalase solution and placed them into a beaker containing dilute hydrogen peroxide. After 30 seconds the disks floated to the surface. Which statement best explains why the disks floated?
Catalase solution is less dense than hydrogen peroxide.
The catalase solution quickly dissolves in the hydrogen peroxide causing the disks to float.
Oxygen bubbles are produced during the breakdown of the hydrogen causing the disks to float.
Hydrogen peroxide is hydrophobic causing the disks to float.
Hydrogen peroxide and catalase repel each other, causing the disks to float.
Which set of atoms are a characteristic of a nucleic acids?
Ca, Fe, K
C, H, O
C, H, O, P
C,H, O, N, S
C, H, O, N, P
Which set of atoms are characteristics of carbohydrates?
C, H, O, S
C, H, O, P
C, H, O, N
C, H,O
Which depicts glucose?
Which depicts a monomer of fats or oils?
