IB Bio Final 2020-21_VA cloned 6/10/2021

1

The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surrounding
medium becomes 5 %. What will be the likely response?

The cell will shrink from loss of water.

The cell will gain water from the medium.

The cell will remain unchanged.

The cell will lose salt to the medium.

1

Which conclusion can be drawn, based on these data?

The more margarine consumed, the greater the incidence of coronary heart disease.

It is better to eat margarine than to eat butter.

Butter is a natural product whereas margarine is hydrogenated vegetable oil that leads to

coronary heart disease.

Margarine causes more heart related deaths than butter.

1

Which process causes ADP to change to ATP?

Anaerobic cell respiration

Protein synthesis

Hydrolysis

DNA replication

1

What occurs during meiosis but not mitosis?

Centromeres split.

Spindles are formed from microtubules.

Homologous chromosomes pair up.

Chromosome number is conserved.

1

Which two processes correspond to the labelled arrows?

K is combustion and L is catabolism

J is anabolism and K is respiration.

J is combustion and K is respiration.

J is anabolism and L is catabolism.

1

What is the name of the cell component labelled Y?

Golgi apparatus

Cytoplasm

A. Vacuole

Nucleus

1

Which sequence has the cells arranged according to their ability to differentiate, starting from the least able?

neuron, bone marrow, umbilical, embryonic

bone marrow, neuron, embryonic, umbilical

umbilical, embryonic, bone marrow, neuron

embryonic, umbilical, bone marrow, neuron

1

A

B

C

D

1

How many chromosomes are there in a cell during anaphase of mitosis, if the diploid number of the cell is 20?

10

20

40

80

1

A

B

C

D

1

A 9-year-old boy has a height of 120 cm and weighs 28.8 kg. What weight category is he in according to his BMI?

Obese

Underweight

Healthy

Overweight

1

In a coding gene, the DNA triplet in the transcribed strand is changed from AGG to TCG. What would be the result of this change in the genome?

A non-functional protein

Termination of the polypeptide

No change in the protein

A different but functional protein

1

A

B

C

D

1

What is the reason for Taq DNA polymerase being used in the polymerase chain reaction (PCR)?

It does not denature at high temperatures.

It produces Okazaki fragments more rapidly.

It allows translation to proceed rapidly.

It works efficiently with helicase in PCR.

1

Which diagram(s) represent(s) processes used in asexual reproduction?

I only

I and II only

II only

I, II and III

1

What is shown by the graph?

There is no photosynthesis between Y and Z.

There is more respiration than photosynthesis between W and X.

There is no photosynthesis between W and X.

There is more respiration than photosynthesis between Y and Z.

1

What is the mode of inheritance of the genetic disease?

Inherited as a dominant sex-linked allele

Inherited as a recessive autosomal allele

Inherited as a dominant autosomal allele

Inherited as a recessive sex-linked allele

1

Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants,
270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?

Only 90 plants were homozygous.

All dwarf plants were homozygous.

All 270 tall plants were homozygous.

All 270 tall plants were heterozygous.

1

What are all the possible phenotypes of children born to a mother with blood group AB and a
father with blood group A?

AB, A and B

A and B

AB, A and O

AB only

1

I only

II only

I and II only

I and III only

1

How can a chi-squared test be used in ecological research?

To test whether two species tend to live together

To test whether one population of plants is taller than another

To test the effect of an abiotic factor on one plant species

To test whether one species is more tolerant to heavy metals than another

1

Under certain conditions, living organisms on Earth produce and release methane. What
favors the production of methane?

Forest fires

Dry conditions

Anaerobic conditions

High light intensity

1

The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossil
fuels has increased carbon dioxide ocean concentrations. What adverse effect does this
have on marine life?

Heterotrophs consume more phytoplankton.

Phytoplankton have increased rates of photosynthesis.

Corals deposit less calcium carbonate to form skeletons.

Increased pH reduces enzyme activity in marine organisms.

1

What process best explains the formation of different pentadactyl limbs?

Selective breeding

Convergence

Adaptive radiation

Interbreeding

1

What would restrict evolution by natural selection, if a species only reproduced by cloning?

Mutations could not occur.

The offspring would show a lack of variation.

The offspring would be the same sex as the parent.

Too few offspring would be produced.

1

An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbon
shape. Which phylum does the animal belong to?

Annelida

Platyhelmintha

Mollusca

Cnidaria

1

A

B

C

D

1

Which of these structures is not homologous?

A

B

C

D

1

If the data were used to draw a cladogram, which chordates would be furthest apart from humans?

Horse because it is in the same class

Fruit fly because it has the most differences

Tuna fish because it is the chordate with the most differences

Chimpanzee because it has zero differences

IB Bio Final 2020-21_VA cloned 6/10/2021

The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surroundingmedium becomes 5 %. What will be the likely response?

Which conclusion can be drawn, based on these data?

Which process causes ADP to change to ATP?

What occurs during meiosis but not mitosis?

Which two processes correspond to the labelled arrows?

What is the name of the cell component labelled Y?

Which sequence has the cells arranged according to their ability to differentiate, starting from the least able?

How many chromosomes are there in a cell during anaphase of mitosis, if the diploid number of the cell is 20?

A 9-year-old boy has a height of 120 cm and weighs 28.8 kg. What weight category is he in according to his BMI?

In a coding gene, the DNA triplet in the transcribed strand is changed from AGG to TCG. What would be the result of this change in the genome?

What is the reason for Taq DNA polymerase being used in the polymerase chain reaction (PCR)?

Which diagram(s) represent(s) processes used in asexual reproduction?

What is shown by the graph?

What is the mode of inheritance of the genetic disease?

Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants,270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?

What are all the possible phenotypes of children born to a mother with blood group AB and afather with blood group A?

How can a chi-squared test be used in ecological research?

Under certain conditions, living organisms on Earth produce and release methane. Whatfavors the production of methane?

The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossilfuels has increased carbon dioxide ocean concentrations. What adverse effect does thishave on marine life?

What process best explains the formation of different pentadactyl limbs?

What would restrict evolution by natural selection, if a species only reproduced by cloning?

An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbonshape. Which phylum does the animal belong to?

Which of these structures is not homologous?

If the data were used to draw a cladogram, which chordates would be furthest apart from humans?

The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surroundingmedium becomes 5 %. What will be the likely response?

Which conclusion can be drawn, based on these data?

Which process causes ADP to change to ATP?

What occurs during meiosis but not mitosis?

Which two processes correspond to the labelled arrows?

What is the name of the cell component labelled Y?

Which feature of the cell in the micrograph is consistent with the endosymbiotic theory?

Which sequence has the cells arranged according to their ability to differentiate, starting from the least able?

How many chromosomes are there in a cell during anaphase of mitosis, if the diploid number of the cell is 20?

A 9-year-old boy has a height of 120 cm and weighs 28.8 kg. What weight category is he in according to his BMI?

In a coding gene, the DNA triplet in the transcribed strand is changed from AGG to TCG. What would be the result of this change in the genome?

What is the reason for Taq DNA polymerase being used in the polymerase chain reaction (PCR)?

Which diagram(s) represent(s) processes used in asexual reproduction?

What is shown by the graph?

What is the mode of inheritance of the genetic disease?

Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants,270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?

What are all the possible phenotypes of children born to a mother with blood group AB and afather with blood group A?

How can a chi-squared test be used in ecological research?

Under certain conditions, living organisms on Earth produce and release methane. Whatfavors the production of methane?

The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossilfuels has increased carbon dioxide ocean concentrations. What adverse effect does thishave on marine life?

What process best explains the formation of different pentadactyl limbs?

What would restrict evolution by natural selection, if a species only reproduced by cloning?

An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbonshape. Which phylum does the animal belong to?

Which of these structures is not homologous?

If the data were used to draw a cladogram, which chordates would be furthest apart from humans?

Which feature of the cell in the micrograph is consistent with the endosymbiotic theory?

The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surrounding
medium becomes 5 %. What will be the likely response?

Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants,
270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?

What are all the possible phenotypes of children born to a mother with blood group AB and a
father with blood group A?

Under certain conditions, living organisms on Earth produce and release methane. What
favors the production of methane?

The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossil
fuels has increased carbon dioxide ocean concentrations. What adverse effect does this
have on marine life?

An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbon
shape. Which phylum does the animal belong to?

The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surrounding
medium becomes 5 %. What will be the likely response?

Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants,
270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?

What are all the possible phenotypes of children born to a mother with blood group AB and a
father with blood group A?

Under certain conditions, living organisms on Earth produce and release methane. What
favors the production of methane?

The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossil
fuels has increased carbon dioxide ocean concentrations. What adverse effect does this
have on marine life?

An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbon
shape. Which phylum does the animal belong to?