Unit 3 Chemistry of Life Re-Take
Quiz by Dr. Kendra Whitney
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- Q1
The electrons of an atom
have positive charge
occupy the space surrounding the nucleus
are attracted to the positive charge of neutrons
are found in the nucleus along with the protons
30s - Q2
All matter is composed of
oxygen
cells
carbon
atoms
30s - Q3
Phosphorous has an atomic number of 15 and an atomic mass of 31. Which of the following is true?
phosphorous has 15 protons
phosphorous has 31 neutrons
phosphorous has 15 electrons
Phosphorous has 15 neutrons
30s - Q4
Which of the following is not a macromolecule
carbohydrate
protein
these are all macromolecules
lipid
ice
30s - Q5
Atoms of the same element that have a different number of neutrons are called
isotopes
lipids
molecules
polar
30s - Q6
The two types of nucleic acids are
glucose and glycogen
DNA and RNA
lipids and sugars
catalase and lactase
30s - Q7
When an electron is transferred from one atom to another, this forms a(n)
covalent bond
hydrogen bond
ionic bond
polar molecule
30s - Q8
Which of the following bonds is the weakest?
ionic
covalent
polar
hydrogen
30s - Q9
The molecule that is formed at the end of a chemical reaction using an enzyme is called a(n)
inhibitor
substrate
product
active site
30s - Q10
Th oxygen side of a water molecule is slightly attracted to the hydrogen side of another water molecule. This is caused by water's _____ and causes water to ____.
acidity; creep up thin tubes
capillary action; divide into hydrogen and hydroxide ions
adhesion; neutralize bases
polarity; form hydrogen bonds
30s - Q11
The reason small polar molecules can easily disperse into your blood stream and travel to other parts of your body is because
water has high surface tension
water resists temperature change
water can creep up thin tubes
water is a universal solvent
30s - Q12
Your dad put powdered chlorine in your swimming pool. In this situation, the swimming pool water is
the solvent
the solute
an acid
a base
30s - Q13
A solution that forms an equal amount of H+ and OH- ions in a solution is called a _____ solution
cohesive
universal
polar
neutral
30s - Q14
Which of the following is a characteristic of a base?
tastes sour
has a higher concentration of OH- ions than water
reacts easily with metals
pH is lower than 7
30s - Q15
The ability for a water strider to remain on the surface of water is caused by
capillary action
enzymes
adhesion
cohesion
30s