Question 1

Select the parts that make up the backbone of the DNA molecule.Select the TWO answers that are correct.

Accepted Answer

A)  nucleoside 
B)  glycine 
C)  phosphate 
D)  sugar 
E)  nitrogenous base 
A)  nucleoside 
B)  glycine 
C)  phosphate 
D)  sugar 
E)  nitrogenous base

Question 2

What makes nicotine addictive?

Accepted Answer

A)  It replaces hormones in the body. 
B)  It promotes digestive and endocrine function. 
C)  It stimulates pleasurable feelings in the brain. 
D)  It is slowly absorbed by the body. 
E)  It is chemically identical to dopamine. 
A)  It replaces hormones in the body. 
B)  It promotes digestive and endocrine function. 
C)  It stimulates pleasurable feelings in the brain. 
D)  It is slowly absorbed by the body. 
E)  It is chemically identical to dopamine.

Question 3

What is meant by incomplete dominance?

Accepted Answer

A)  The dominant allele in an X-linked trait is more likely to be expressed in males than in females. 
B)  The two alleles in a heterozygote each equally produce their own distinct phenotype. 
C)  In homozygotes only the dominant form of the allele is expressed. 
D)  Homozygotes have phenotypes in which the two forms of the allele are expressed separately. 
E)  Heterozygotes have a phenotype that is a mixture of the two alleles. 
A)  The dominant allele in an X-linked trait is more likely to be expressed in males than in females. 
B)  The two alleles in a heterozygote each equally produce their own distinct phenotype. 
C)  In homozygotes only the dominant form of the allele is expressed. 
D)  Homozygotes have phenotypes in which the two forms of the allele are expressed separately. 
E)  Heterozygotes have a phenotype that is a mixture of the two alleles.

Question 4

How can multiple pollinators share the same habitat if they all need pollen?

Accepted Answer

A)  The individual pollinators compete to determine who collects pollen first. 
B)  As the number of pollinators increases,the flowers produce more pollen. 
C)  All the pollinators randomly harvest pollen within the habitat. 
D)  Each pollinator uses flowers with specific characteristics as its niche. 
E)  Every species defends a territory from pollinators of other species. 
A)  The individual pollinators compete to determine who collects pollen first. 
B)  As the number of pollinators increases,the flowers produce more pollen. 
C)  All the pollinators randomly harvest pollen within the habitat. 
D)  Each pollinator uses flowers with specific characteristics as its niche. 
E)  Every species defends a territory from pollinators of other species.

Question 5

How does multiple sclerosis affect neurons and their function?

Accepted Answer

A)  Neurons lack myelin so they cannot efficiently transmit signals to muscles. 
B)  Potassium channels of neurons do not open so action potentials cannot travel down the axon. 
C)  The axon terminal of neurons is dysfunctional so no electrical signals are transmitted to neighboring cells. 
D)  The cell body lacks dendrites so the neuron cannot receive sensory input to react to. 
E)  Sodium channels of neurons do not open so action potentials cannot be generated. 
A)  Neurons lack myelin so they cannot efficiently transmit signals to muscles. 
B)  Potassium channels of neurons do not open so action potentials cannot travel down the axon. 
C)  The axon terminal of neurons is dysfunctional so no electrical signals are transmitted to neighboring cells. 
D)  The cell body lacks dendrites so the neuron cannot receive sensory input to react to. 
E)  Sodium channels of neurons do not open so action potentials cannot be generated.

Question 6

In the late Devonian era,the seas began to recede and the land became more fertile.These environmental changes resulted in the emergence of land-dwelling vertebrates.Some animals are better able to survive and reproduce under changing environmental conditions.This is an example of:

Accepted Answer

A)  adaptation 
B)  evolution 
C)  mutation 
D)  speciation 
E)  natural selection 
A)  adaptation 
B)  evolution 
C)  mutation 
D)  speciation 
E)  natural selection

Question 7

Select the scenario in which a mutation may become fixed in a population.

Accepted Answer

A)  A mutation causing light skin shows up in a population of people living near the equator in South America. 
B)  A mutation for a stubby tail occurs in a population of Eastern gray squirrels,which normally have long,bushy tails. 
C)  Several bacteria in a population resistant to the antibiotic erythromycin show susceptibility to erythromycin because of a recent mutation. 
D)  A mutation occurs in a population of brown toads,causing green stripes that allow for better camouflaging in its habitat. 
E)  In a population of people whose main food source is the milk of their livestock,a mutation for lactose intolerance appears. 
A)  A mutation causing light skin shows up in a population of people living near the equator in South America. 
B)  A mutation for a stubby tail occurs in a population of Eastern gray squirrels,which normally have long,bushy tails. 
C)  Several bacteria in a population resistant to the antibiotic erythromycin show susceptibility to erythromycin because of a recent mutation. 
D)  A mutation occurs in a population of brown toads,causing green stripes that allow for better camouflaging in its habitat. 
E)  In a population of people whose main food source is the milk of their livestock,a mutation for lactose intolerance appears.

Question 8

Why might future conflicts and wars be over access to fresh water? Select the TWO answers that are correct.

Accepted Answer

A)  Fresh water is abundant in all human societies. 
B)  Population density does not affect local water demand. 
C)  The water supply is being divided between more people. 
D)  Fresh water supplies are unevenly distributed around the globe. 
E)  Fresh water is uniformly distributed around the globe. 
A)  Fresh water is abundant in all human societies. 
B)  Population density does not affect local water demand. 
C)  The water supply is being divided between more people. 
D)  Fresh water supplies are unevenly distributed around the globe. 
E)  Fresh water is uniformly distributed around the globe.

Question 9

Which phrases accurately describe the role of microtubules in the cell cycle? Select the TWO answers that are correct.

Accepted Answer

A)  migration of the chromosomes 
B)  disassembly of the nuclear membrane 
C)  organization of the chromosomes 
D)  replication of the chromosomes 
E)  separation of the cell cytoplasm 
A)  migration of the chromosomes 
B)  disassembly of the nuclear membrane 
C)  organization of the chromosomes 
D)  replication of the chromosomes 
E)  separation of the cell cytoplasm

Question 10

Which members of the plant kingdom produce seeds? Select the TWO answers that are correct.

Accepted Answer

A)  gymnosperms 
B)  mosses 
C)  bryophytes 
D)  angiosperms 
E)  ferns 
A)  gymnosperms 
B)  mosses 
C)  bryophytes 
D)  angiosperms 
E)  ferns

Question 11

One argument explaining why viruses are not living is that viruses depend on the cells of other living creatures in order to multiply.Which characteristics of life does this argument use? Select the TWO answers that are correct.

Accepted Answer

A)  growth 
B)  homeostasis 
C)  respond to stimuli 
D)  reproduction 
E)  use energy 
A)  growth 
B)  homeostasis 
C)  respond to stimuli 
D)  reproduction 
E)  use energy

Question 12

Why are eukaryotic cells unaffected by streptomycin and similar antibiotics?

Accepted Answer

A)  Eukaryotic cells are unaffected by these antibiotics because eukaryotic cells lack cell walls. 
B)  Eukaryotic cell walls are unaffected by these antibiotics because the cell walls do not contain peptidoglycan. 
C)  Eukaryotic DNA replication is not disrupted because these antibiotics do not disrupt the enzymes used to produce eukaryotic DNA. 
D)  Eukaryotic protein synthesis is not disrupted because these antibiotics do not disrupt eukaryotic ribosomal activity. 
E)  Eukaryotic cells have organelles called lysosomes that engulf and break down these types of antibiotics. 
A)  Eukaryotic cells are unaffected by these antibiotics because eukaryotic cells lack cell walls. 
B)  Eukaryotic cell walls are unaffected by these antibiotics because the cell walls do not contain peptidoglycan. 
C)  Eukaryotic DNA replication is not disrupted because these antibiotics do not disrupt the enzymes used to produce eukaryotic DNA. 
D)  Eukaryotic protein synthesis is not disrupted because these antibiotics do not disrupt eukaryotic ribosomal activity. 
E)  Eukaryotic cells have organelles called lysosomes that engulf and break down these types of antibiotics.

Question 13

What did the ability to control fire allow early hominids to do? Select the THREE answers that are correct.

Accepted Answer

A)  isolate metals from ore 
B)  cook food 
C)  defend against predators 
D)  walk with an upright gait 
E)  provide warmth 
A)  isolate metals from ore 
B)  cook food 
C)  defend against predators 
D)  walk with an upright gait 
E)  provide warmth

Question 14

What adaptations do succulents have that balance the need to conserve water with the demands of photosynthesis? Select the TWO answers that are correct.

Accepted Answer

A)  They bring water in through their stomata when dew forms on leaves before dawn. 
B)  They only open their stomata at night after the air temperature drops. 
C)  Special enzymes store carbon dioxide at night for use in daytime photosynthesis. 
D)  Their method of photosynthesizing requires fewer steps and uses less water. 
E)  Stomata on their roots allow them to take in carbon dioxide from the soil. 
A)  They bring water in through their stomata when dew forms on leaves before dawn. 
B)  They only open their stomata at night after the air temperature drops. 
C)  Special enzymes store carbon dioxide at night for use in daytime photosynthesis. 
D)  Their method of photosynthesizing requires fewer steps and uses less water. 
E)  Stomata on their roots allow them to take in carbon dioxide from the soil.

Question 15

Assume a phenotype is determined by one gene with a dominant allele and a recessive allele.If both parents are heterozygous,what is the probability of an offspring being a carrier of the recessive allele?

Accepted Answer

A)  75% 
B)  50% 
C)  25% 
D)  0% 
E)  100% 
A)  75% 
B)  50% 
C)  25% 
D)  0% 
E)  100%

Question 16

A grandfather has an X-linked disease.His wife does not have the disease and she is not a carrier for it.What is the probability that their daughter's sons will have the disease?

Accepted Answer

A)  100% 
B)  25% 
C)  0% 
D)  75% 
E)  50% 
A)  100% 
B)  25% 
C)  0% 
D)  75% 
E)  50%

Question 17

Why do some enzymes need a cofactor in order to function?

Accepted Answer

A)  The presence of a cofactor increases the activation energy of some enzymes. 
B)  The presence of a cofactor allows some enzymes to bind to their substrates. 
C)  The presence of a cofactor facilitates the conversion of products into reactants. 
D)  The presence of a cofactor reduces the activation energy of some enzymes. 
E)  The presence of a cofactor allows some enzymes to enlarge their active sites. 
A)  The presence of a cofactor increases the activation energy of some enzymes. 
B)  The presence of a cofactor allows some enzymes to bind to their substrates. 
C)  The presence of a cofactor facilitates the conversion of products into reactants. 
D)  The presence of a cofactor reduces the activation energy of some enzymes. 
E)  The presence of a cofactor allows some enzymes to enlarge their active sites.

Question 18

What happens to the parent cell during binary fission?

Accepted Answer

A)  It quadruples its DNA and other contents,and then divides in four. 
B)  It fuses with another parent cell to form two daughter cells. 
C)  It elongates,replicates its DNA,and divides in two. 
D)  It takes up DNA,incorporates it,and then separates into two cells. 
E)  It splits open,releases a daughter cell,and dissolves. 
A)  It quadruples its DNA and other contents,and then divides in four. 
B)  It fuses with another parent cell to form two daughter cells. 
C)  It elongates,replicates its DNA,and divides in two. 
D)  It takes up DNA,incorporates it,and then separates into two cells. 
E)  It splits open,releases a daughter cell,and dissolves.

Question 19

What is activation energy?

Accepted Answer

A)  the energy necessary to bind amino acids into a protein 
B)  the energy necessary to provide power to an enzyme 
C)  the energy necessary to turn a product into a reactant 
D)  the energy necessary to bind a substrate to an enzyme 
E)  the energy necessary to initiate a chemical reaction 
A)  the energy necessary to bind amino acids into a protein 
B)  the energy necessary to provide power to an enzyme 
C)  the energy necessary to turn a product into a reactant 
D)  the energy necessary to bind a substrate to an enzyme 
E)  the energy necessary to initiate a chemical reaction

Question 20

What characteristics do fungus-like protists have? Select the TWO answers that are correct.

Accepted Answer

A)  They form thin,thread-like structures. 
B)  They decompose other organisms. 
C)  They can photosynthesize. 
D)  They move using flagella. 
E)  They produce roots and stems. 
A)  They form thin,thread-like structures. 
B)  They decompose other organisms. 
C)  They can photosynthesize. 
D)  They move using flagella. 
E)  They produce roots and stems.

Exam 33: A Range of Biology

Select the parts that make up the backbone of the DNA molecule.Select the TWO answers that are correct.

What makes nicotine addictive?

What is meant by incomplete dominance?

How can multiple pollinators share the same habitat if they all need pollen?

How does multiple sclerosis affect neurons and their function?

In the late Devonian era,the seas began to recede and the land became more fertile.These environmental changes resulted in the emergence of land-dwelling vertebrates.Some animals are better able to survive and reproduce under changing environmental conditions.This is an example of:

Select the scenario in which a mutation may become fixed in a population.

Why might future conflicts and wars be over access to fresh water? Select the TWO answers that are correct.

Which phrases accurately describe the role of microtubules in the cell cycle? Select the TWO answers that are correct.

Which members of the plant kingdom produce seeds? Select the TWO answers that are correct.

One argument explaining why viruses are not living is that viruses depend on the cells of other living creatures in order to multiply.Which characteristics of life does this argument use? Select the TWO answers that are correct.

Why are eukaryotic cells unaffected by streptomycin and similar antibiotics?

What did the ability to control fire allow early hominids to do? Select the THREE answers that are correct.

What adaptations do succulents have that balance the need to conserve water with the demands of photosynthesis? Select the TWO answers that are correct.

Assume a phenotype is determined by one gene with a dominant allele and a recessive allele.If both parents are heterozygous,what is the probability of an offspring being a carrier of the recessive allele?

A grandfather has an X-linked disease.His wife does not have the disease and she is not a carrier for it.What is the probability that their daughter's sons will have the disease?

Why do some enzymes need a cofactor in order to function?

What happens to the parent cell during binary fission?

What is activation energy?

What characteristics do fungus-like protists have? Select the TWO answers that are correct.

Process of Science

Chemistry of Life

Cell Structure and Function

Nutrition, Enzymes, Metabolism

Energy and Photosynthesis

Dietary Energy and Cellular Respiration

Genes to Proteins

DNA Structure and Replication

Cell Cycle and Cell Differentiation

Mutations and Cancer

Simple Inheritance and Meiosis

Complex Inheritance

Natural Selection and Adaptation

Nonadaptive Evolution and Speciation

Evidence for Evolution

Life on Earth

Prokaryotic Diversity

Eukaryotic Diversity

Human Evolution

Population Ecology

Community Ecology

Ecosystem Ecology

Sustainability

Plant Growth and Reproduction

Plant Physiology

Overview of Physiology

Digestive System

Cardiovascular System

Respiratory System

Central Nervous System

Reproductive System

Immune System

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