BIOLOGY 1010 EXAM
Which of these lifestyle choices will increase cancer risk?
a)eating more foods such as cabbage and cauliflower
b) quitting smoking
c) a diet high in animal fat
d) jogging
e) a diet high in plant fiber - ANSWER-a diet high in animal fat
______ are the most diverse group of arthropods.
a)Centipedes
b) Crustaceans
c)Insects
d)Arachnids
e)Millipedes - ANSWER-Insects
Which of these statements can be logically inferred from the amount of DNA
shared by chimpanzees and humans?
a) Humans are a more complex life form than chimpanzees.
b)Humans evolved from chimpanzees.
c) Humans are unique and different from all other life forms.
d)Humans and chimpanzees share a relatively recent common ancestor.
e)Humans have many more genes than chimpanzees do. - ANSWER-Humans
and chimpanzees share a relatively recent common ancestor.
,The first hominid to spread beyond Africa was ______.
a)Australopithecus afarensis
b)Homo sapiens
c)"Lucy"
d)Homo erectus
e) Homo neanderthalensis - ANSWER-Homo erectus
Which hominid had the largest brain size measured in cc (cubic centimeters)?
a)Homo erectus
b)Homo neanderthalensis
c) Australopithecus afarensis
d) Homo sapiens
e) Paranthropus boisei - ANSWER-Homo neanderthalensis
Scientists recommend a diet rich in antioxidants to stay healthy. What occurs at
the atomic level to explain this recommendation?
a)Antioxidants stop the chain reaction of cellular damage caused by free
radicals.
b) Antioxidants cause an increase in pH, which is necessary for neutrality in
cells.
c) Antioxidants are inert and do not interact with free radicals.
d) Antioxidants steal electrons, which gives cells extra energy. - ANSWER-
Antioxidants stop the chain reaction of cellular damage caused by free radicals.
Adjacent water molecules are connected by the ______.
a)sharing of electrons between adjacent oxygen molecules
b)electrical attraction between the hydrogens of adjacent water molecules
c) sharing of electrons between the hydrogen of one water molecule and the
oxygen of another water molecule
,d) electrical attraction between the hydrogen of one water molecule and the
oxygen of another water molecule - ANSWER-electrical attraction between the
hydrogen of one water molecule and the oxygen of another water molecule
In a water molecule, hydrogen and oxygen are held together by a(n) ________
bond.
a)double covalent
b) hydrogen
c) nonpolar covalent
d) polar covalent - ANSWER-polar covalent
What name is given to substances that resist changes in pH?
a) salts
b) sugars
c) bases
d) buffers - ANSWER-buffers
Radioactive isotopes are biological tools that are often used to:
a) build up a store of calcium in a cell.
b) increase the pH of blood.
c) measure the size of fossils.
d) detect brain tumors. - ANSWER-detect brain tumors.
The difference between one amino acid and another is the:
a)number of R groups each contains.
b)number of amino and carboxyl groups each contains.
c)type of R group each contains.
d) difference in the chemical properties of their amino and carboxyl groups.
, e)way their amino groups bond with carboxyl groups. - ANSWER-type of R
group each contains.
In many cases, carbohydrates have the following ratio of elements:
a)carbon, hydrogen, and nitrogen in a ratio of 1:2:1.
b) carbon and hydrogen in a ratio of 1:2.
c) carbon, hydrogen, and oxygen in a ratio of 1:2:1.
d) carbon, hydrogen, and oxygen in a ratio of 2:1:2.
e) carbon, oxygen, and hydrogen in a ratio of 1:2:1. - ANSWER-carbon,
hydrogen, and oxygen in a ratio of 1:2:1.
Why did the lactose tolerance mutation in the East African herders spread so
rapidly within the population?
a) Lactose was a better source of energy than glucose.
b) Milk provided calcium for strong bones.
c) It was a selective advantage for survival during droughts.
d) Milk was a good source of protein during the winter. - ANSWER-It was a
selective advantage for survival during droughts.
Unsaturated fatty acids:
a) have one or more double bonds between the carbons.
b) have long been linked with heart disease.
c) contain the maximum number of hydrogen atoms possible.
d) are usually found in animal fats - ANSWER-have one or more double bonds
between the carbons
HDL and LDL are different types of cholesterol found in the blood. These
compounds are:
a)proteins.
Which of these lifestyle choices will increase cancer risk?
a)eating more foods such as cabbage and cauliflower
b) quitting smoking
c) a diet high in animal fat
d) jogging
e) a diet high in plant fiber - ANSWER-a diet high in animal fat
______ are the most diverse group of arthropods.
a)Centipedes
b) Crustaceans
c)Insects
d)Arachnids
e)Millipedes - ANSWER-Insects
Which of these statements can be logically inferred from the amount of DNA
shared by chimpanzees and humans?
a) Humans are a more complex life form than chimpanzees.
b)Humans evolved from chimpanzees.
c) Humans are unique and different from all other life forms.
d)Humans and chimpanzees share a relatively recent common ancestor.
e)Humans have many more genes than chimpanzees do. - ANSWER-Humans
and chimpanzees share a relatively recent common ancestor.
,The first hominid to spread beyond Africa was ______.
a)Australopithecus afarensis
b)Homo sapiens
c)"Lucy"
d)Homo erectus
e) Homo neanderthalensis - ANSWER-Homo erectus
Which hominid had the largest brain size measured in cc (cubic centimeters)?
a)Homo erectus
b)Homo neanderthalensis
c) Australopithecus afarensis
d) Homo sapiens
e) Paranthropus boisei - ANSWER-Homo neanderthalensis
Scientists recommend a diet rich in antioxidants to stay healthy. What occurs at
the atomic level to explain this recommendation?
a)Antioxidants stop the chain reaction of cellular damage caused by free
radicals.
b) Antioxidants cause an increase in pH, which is necessary for neutrality in
cells.
c) Antioxidants are inert and do not interact with free radicals.
d) Antioxidants steal electrons, which gives cells extra energy. - ANSWER-
Antioxidants stop the chain reaction of cellular damage caused by free radicals.
Adjacent water molecules are connected by the ______.
a)sharing of electrons between adjacent oxygen molecules
b)electrical attraction between the hydrogens of adjacent water molecules
c) sharing of electrons between the hydrogen of one water molecule and the
oxygen of another water molecule
,d) electrical attraction between the hydrogen of one water molecule and the
oxygen of another water molecule - ANSWER-electrical attraction between the
hydrogen of one water molecule and the oxygen of another water molecule
In a water molecule, hydrogen and oxygen are held together by a(n) ________
bond.
a)double covalent
b) hydrogen
c) nonpolar covalent
d) polar covalent - ANSWER-polar covalent
What name is given to substances that resist changes in pH?
a) salts
b) sugars
c) bases
d) buffers - ANSWER-buffers
Radioactive isotopes are biological tools that are often used to:
a) build up a store of calcium in a cell.
b) increase the pH of blood.
c) measure the size of fossils.
d) detect brain tumors. - ANSWER-detect brain tumors.
The difference between one amino acid and another is the:
a)number of R groups each contains.
b)number of amino and carboxyl groups each contains.
c)type of R group each contains.
d) difference in the chemical properties of their amino and carboxyl groups.
, e)way their amino groups bond with carboxyl groups. - ANSWER-type of R
group each contains.
In many cases, carbohydrates have the following ratio of elements:
a)carbon, hydrogen, and nitrogen in a ratio of 1:2:1.
b) carbon and hydrogen in a ratio of 1:2.
c) carbon, hydrogen, and oxygen in a ratio of 1:2:1.
d) carbon, hydrogen, and oxygen in a ratio of 2:1:2.
e) carbon, oxygen, and hydrogen in a ratio of 1:2:1. - ANSWER-carbon,
hydrogen, and oxygen in a ratio of 1:2:1.
Why did the lactose tolerance mutation in the East African herders spread so
rapidly within the population?
a) Lactose was a better source of energy than glucose.
b) Milk provided calcium for strong bones.
c) It was a selective advantage for survival during droughts.
d) Milk was a good source of protein during the winter. - ANSWER-It was a
selective advantage for survival during droughts.
Unsaturated fatty acids:
a) have one or more double bonds between the carbons.
b) have long been linked with heart disease.
c) contain the maximum number of hydrogen atoms possible.
d) are usually found in animal fats - ANSWER-have one or more double bonds
between the carbons
HDL and LDL are different types of cholesterol found in the blood. These
compounds are:
a)proteins.
