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Biology > BIOLOGY GCSE AQA 2025 HIGHER TRIPLE ALL CONTENT AND COMMLY MADE MISTAKES OR ASKED QUESTIONS > Flashcards

BIOLOGY GCSE AQA 2025 HIGHER TRIPLE ALL CONTENT AND COMMLY MADE MISTAKES OR ASKED QUESTIONS Flashcards

1
Q

What is the basic unit of life?

A

Cell

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2
Q

True or False: All living organisms are made up of one or more cells.

A

True

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3
Q

Fill in the blank: The process by which plants convert sunlight into energy is called __________.

A

Photosynthesis

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4
Q

What is the function of ribosomes in a cell?

A

Protein synthesis

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5
Q

Multiple choice: Which of the following is NOT a type of RNA? A) mRNA B) tRNA C) rDNA D) rRNA

A

C) rDNA

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6
Q

What is the role of the mitochondria in cells?

A

Energy production

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7
Q

True or False: DNA stands for Deoxyribonucleic Acid.

A

True

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8
Q

What are the four nucleotide bases in DNA?

A

Adenine, Thymine, Cytosine, Guanine

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9
Q

Fill in the blank: The __________ is the control center of the cell.

A

Nucleus

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10
Q

Multiple choice: What type of cell division produces gametes? A) Mitosis B) Meiosis C) Binary fission D) Budding

A

B) Meiosis

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11
Q

What is the purpose of the cell membrane?

A

To control the movement of substances in and out of the cell

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12
Q

True or False: Enzymes are proteins that act as catalysts in biochemical reactions.

A

True

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13
Q

What is the pH range of acidic solutions?

A

Less than 7

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14
Q

Fill in the blank: The __________ is the site of photosynthesis in plant cells.

A

Chloroplast

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15
Q

Multiple choice: Which of the following is a greenhouse gas? A) Oxygen B) Nitrogen C) Carbon Dioxide D) Hydrogen

A

C) Carbon Dioxide

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16
Q

What is the primary function of the plasma membrane?

A

To protect the cell and regulate transport

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17
Q

True or False: The theory of evolution was proposed by Charles Darwin.

A

True

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18
Q

What is a phenotype?

A

The physical expression of a trait

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19
Q

Fill in the blank: An organism’s genetic makeup is referred to as its __________.

A

Genotype

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20
Q

Multiple choice: Which process involves the movement of water across a semipermeable membrane? A) Diffusion B) Osmosis C) Active Transport D) Facilitated Diffusion

A

B) Osmosis

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21
Q

What type of bond holds the two strands of DNA together?

A

Hydrogen bonds

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22
Q

True or False: A mutation can lead to changes in an organism’s traits.

A

True

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23
Q

What is the role of chlorophyll in plants?

A

To absorb light energy for photosynthesis

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24
Q

Fill in the blank: The __________ is responsible for controlling the activities of the cell.

A

Nucleus

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25
Q

Multiple choice: Which of the following is an example of a decomposer? A) Grass B) Mushroom C) Rabbit D) Eagle

A

B) Mushroom

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26
Q

What is the main purpose of cellular respiration?

A

To convert glucose into usable energy (ATP)

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27
Q
A
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28
Q

What is homeostasis?

A

The maintenance of a stable internal environment in an organism.

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29
Q

True or False: Homeostasis only involves temperature regulation.

A

False

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30
Q

What role do feedback mechanisms play in homeostasis?

A

They help regulate internal conditions by responding to changes.

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31
Q

Fill in the blank: The process by which organisms regulate their internal environment is called __________.

A

homeostasis

32
Q

What is negative feedback?

A

A process that counteracts a change in a controlled condition.

33
Q

What is an example of a positive feedback mechanism?

A

Childbirth, where contractions increase until delivery.

34
Q

How do kidneys contribute to homeostasis?

A

They filter blood and regulate water and electrolyte balance.

35
Q

What is the significance of thermoregulation?

A

It helps maintain optimal body temperature for enzyme function.

36
Q

True or False: All organisms maintain homeostasis in the same way.

37
Q

What is the primary function of DNA?

A

To store and transmit genetic information.

38
Q

What are the building blocks of DNA?

A

Nucleotides

39
Q

Fill in the blank: The sequence of __________ in DNA determines genetic information.

A

nucleotides

40
Q

What are the four bases of DNA?

A

Adenine, Thymine, Cytosine, Guanine

41
Q

What is the structure of DNA?

A

A double helix.

42
Q

What process copies DNA before cell division?

A

Replication

43
Q

Define inheritance.

A

The process by which genetic information is passed from parents to offspring.

44
Q

What is a phenotype?

A

The physical expression of a genotype.

45
Q

True or False: A genotype can be influenced by environmental factors.

46
Q

What is the difference between dominant and recessive traits?

A

Dominant traits are expressed in the phenotype when at least one allele is present; recessive traits require two alleles to be expressed.

47
Q

What is a Punnett square used for?

A

To predict the genotypes of offspring from parental crosses.

48
Q

Define ecology.

A

The study of interactions between organisms and their environment.

49
Q

What are biotic factors?

A

Living components of an ecosystem, such as plants and animals.

50
Q

What are abiotic factors?

A

Non-living components of an ecosystem, such as water and temperature.

51
Q

True or False: Ecosystems can be small, like a pond, or large, like a forest.

52
Q

What is an ecosystem?

A

A community of living organisms interacting with their physical environment.

53
Q

What is the role of producers in an ecosystem?

A

They convert solar energy into chemical energy through photosynthesis.

54
Q

What is a food chain?

A

A linear sequence of organisms through which nutrients and energy pass.

55
Q

What is biodiversity?

A

The variety of life in a particular habitat or ecosystem.

56
Q

Fill in the blank: The __________ is a hierarchical system that classifies organisms.

57
Q

What is a habitat?

A

The natural environment where an organism lives.

58
Q

What is an ecological niche?

A

The role and position a species has in its environment.

59
Q

True or False: All organisms in an ecosystem have a specific niche.

60
Q

What is carrying capacity?

A

The maximum number of individuals an environment can sustain.

61
Q

What is the difference between a food web and a food chain?

A

A food web consists of multiple interconnected food chains.

62
Q

What is an invasive species?

A

A non-native species that disrupts the ecosystem it invades.

63
Q

What is the greenhouse effect?

A

The trapping of heat in the Earth’s atmosphere by greenhouse gases.

64
Q

What are the main components of the carbon cycle?

A

Carbon fixation, respiration, decomposition, and combustion.

65
Q

Fill in the blank: __________ is the process by which water vapor turns into liquid water.

A

Condensation

66
Q

What is primary succession?

A

The development of an ecosystem in an area where no soil exists.

67
Q

What is secondary succession?

A

The recovery of an ecosystem after a disturbance that does not destroy the soil.

68
Q

What is an autotroph?

A

An organism that produces its own food, typically through photosynthesis.

69
Q

What is a heterotroph?

A

An organism that cannot produce its own food and must consume others.

70
Q

True or False: All organisms can be classified as either autotrophs or heterotrophs.

71
Q

Fill in the blank: __________ are organisms that break down dead organic material.

A

Decomposers

72
Q

What is the purpose of a keystone species?

A

To maintain the structure of an ecological community.

73
Q

What is an ecosystem service?

A

Benefits provided by ecosystems to humans, such as clean water and pollination.

74
Q

What is the role of a predator in an ecosystem?

A

To control the population of prey species.

75
Q

What is the significance of genetic variation?

A

It increases the adaptability and survival of a species.

Biology (3 decks)

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