WorksheetsBio Test 3/23
Total questions: 63
Worksheet time: 33mins
what is the charge of a proton?
+1
-1
0
what is the mass of a proton?
heavy
light
virtually zero
where is the proton located?
in nucleus
outside the nucleus
what is the proton's role in the atom?
determines the identity of the atom
holds together the nucleus
responsible for reactivity
what is the charge of a neutron?
0
+1
-1
what is the mass of a neutron?
heavy
virtually zero
light
where is the neutron located?
inside of nucleus
outside of the nucleus
what is the neutron's role in the atom?
holds together the nucleus
determines the identity of the atom
responsible for reactivity
what is the charge of an electron?
-1
+1
0
what si the mass of an electron?
virtually zero
heavy
light
where is an electron located?
outside nucleus
in nucleus
what is an electron's role in the atom?
responsible for reactivity
determines the identity of the atom
holds together the nucleus
what is an atom?
the smallest basic unit of matter?
one particular type of atom, & it cannot be broken down into a simpler substance by ordinary chemical means
what is an element?
one particular type of atom, & it cannot be broken down into a simpler substance by ordinary chemical means
the smallest basic unit of matter
what is a compound?
a substance made of atoms of different elements bonded together in a certain ratio
one particular type of atom, & it cannot be broken down into a simpler substance by ordinary chemical means
the smallest basic unit of matter
what is a covalent bond?
forms when atoms share a pair of electrons
one particular type of atom, & it cannot be broken down into a simpler substance by ordinary chemical means
a substance made of atoms of different bonded elements bonded together in a certain ratio
the smallest basic unit of matter
what is the percentage of total body weight by oxygen?
65%
18.5%
9.5%
3.2%
what is the percentage of total body weight by carbon?
65%
18.5%
9.5%
3.2%
what is the percentage of total body weight by hydrogen?
9.5%
3.2%
1.5%
65%
what is the percentage of total body weight by nitrogen?
3.2%
1.5%
65%
18.5%
what is the percentage of total body weight by calcium?
1.5%
65%
18.5%
9.5%
what is a molecule?
two or more atoms held together by covalent bonds
an attraction between a slightly positive hydrogen atom & a slightly negative atom
building block of life
basis of most molecules that make up living things
what is a hydrogen bond?
an attraction between a slightly positive hydrogen atom & a slightly negative atom
two or more atoms held together by covalent bonds
building block of life
basis of most molecules that make up living things
what is carbon often called?
building block of life
nonpolar molecule
covalent bond
Which element is the basis of most molecules that make up living things?
water
carbon
oxygen
hydrogen
what do molecules form?
structure of living things
sugars & starches
what do molecules carry out?
most of processes that keep organisms alive
building blocks
structure of living things
what are carbohydrates?
molecules composed of carbon, hydrogen, and oxygen
building blocks of life
an attraction between a slightly positive hydrogen atom & a slightly negative atom
two or more atoms held together by covalent bonds
what are carbohydrates used for?
chemical energy in cells
photosynthesis
phospholipids
examples of carbohydrates
sugars
starches
fats
oils
example of monosaccharides
simple sugars
fructose-fruits
oils
what is the glucose formula?
C₆H₁₂O₆
NH 3
CO 2
CH 4
how is glucose made?
by plant cells during photosynthesis
during chemosynthesis
what are lipids?
nonpolar molecules
polar molecules
what are lipids used for?
energy
cell structure
proteins
examples of lipids
fats
oils
waxes
cholesterol
salt
what is saturated fat?
fatty acids-all carbon-carbon bonds are single bonds
fatty acids w/at least one carbon-carbon double bond
is saturated fat good for you?
no
yes
is unsaturated fat bad for you?
no
yes
what is unsaturated fat?
fatty acids w/at least one carbon-carbon double bond
fatty acids-all carbon-carbon bonds are single bonds
what are fatty acisd?
chains of carbon atoms bonded to hydrogen atoms
molecules composed of carbon, hydrogen, and oxygen
a polymer made of monomers
what is are proteins?
a polymer made of monomers-amino acids
molecules that contain carbon, hydrogen, oxygen, nitrogen, & sometimes sulfur
polymers that are made up of monomers-nucleotides
what are amino acids?
molecules that contain carbon, hydrogen, oxygen, nitrogen, & sometimes sulfur
a polymer that are made up of monomers-amino acids
polymers that are made up of monomers-nucleotides
what are nucleic acids?
polymers that are made up of monomers-nucleotides
molecules that contain carbon, hydrogen, oxygen, nitrogen, & sometimes sulfur
a polymer made of monomers-amino acids
where are proteins stored?
in nucleic acids
in amino acids
in saturated fat
in unsaturated fat
what is cohesion?
stick together
stick to something else
water doesn't really change
what is adhesion?
stick together
stick to something else
water doesn't really change
what is high specific heat?
water doesn't really change
sticks together
sticks to something else
what is pH?
measures a solution's acidity, or its hydrogen ion concentration
molecules that contain carbon, hydrogen, oxygen, nitrogen, & sometimes sulfur
polymers that are made up of monomers-nucleotides
what is surface tension?
comes from hydrogen bonds that cause water molecules to stick together
molecules that contain carbon, hydrogen, oxygen, nitrogen, & sometimes sulfur
polymers that are made up of monomers-nucleotides
what is the pH for water?
7
5
3
0
why did water stick to the penny?
through surface tension
through adhesion
through cohesive bonds
what 3 elements are found in all macromolecules?
CHO
CCI
HO
SO
what are 3 parts of a nucleotide?
sugar
phosphate
base
salt
name the four nitrogen bases
adenine
thymine
guanine
cytosine
what are polar molecules?
when molecules have positive and negative ends
when molecules have the same charge
what is an example of a polar molecule?
water
carbon dioxide
chloride
what are nonpolar molecules?
when molecules have the same charge
when molecules have positive and negative ends
what is an example of a nonpolar molecule?
carbon dioxide
water
ammonia
what is a solution?
a mixture of substances that is the same throughout-a homogeneous mixture
the substance that is present in the greater amount and that dissolves another substance
substance that dissolves in a solvent
what is a solvent?
the substance that is present in the greater amount and that dissolves another substance
a mixture of substances that si the same throughout-a homogeneous mixture
substance that dissolves in a solvent
what are acids?
a compound that releases a proton when it dissolves in water
neither acidic nor basic
compounds that remove H+ ions from a solution
what are bases?
compounds that remove H+ ions from a solution
neither acidic nor basic
a compound that releases a proton when it dissolves in water
