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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

(75 cards)

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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
Multiple choice: Which of the following is an example of a decomposer? A) Grass B) Mushroom C) Rabbit D) Eagle
B) Mushroom
26
What is the main purpose of cellular respiration?
To convert glucose into usable energy (ATP)
27
28
What is homeostasis?
The maintenance of a stable internal environment in an organism.
29
True or False: Homeostasis only involves temperature regulation.
False
30
What role do feedback mechanisms play in homeostasis?
They help regulate internal conditions by responding to changes.
31
Fill in the blank: The process by which organisms regulate their internal environment is called __________.
homeostasis
32
What is negative feedback?
A process that counteracts a change in a controlled condition.
33
What is an example of a positive feedback mechanism?
Childbirth, where contractions increase until delivery.
34
How do kidneys contribute to homeostasis?
They filter blood and regulate water and electrolyte balance.
35
What is the significance of thermoregulation?
It helps maintain optimal body temperature for enzyme function.
36
True or False: All organisms maintain homeostasis in the same way.
False
37
What is the primary function of DNA?
To store and transmit genetic information.
38
What are the building blocks of DNA?
Nucleotides
39
Fill in the blank: The sequence of __________ in DNA determines genetic information.
nucleotides
40
What are the four bases of DNA?
Adenine, Thymine, Cytosine, Guanine
41
What is the structure of DNA?
A double helix.
42
What process copies DNA before cell division?
Replication
43
Define inheritance.
The process by which genetic information is passed from parents to offspring.
44
What is a phenotype?
The physical expression of a genotype.
45
True or False: A genotype can be influenced by environmental factors.
True
46
What is the difference between dominant and recessive traits?
Dominant traits are expressed in the phenotype when at least one allele is present; recessive traits require two alleles to be expressed.
47
What is a Punnett square used for?
To predict the genotypes of offspring from parental crosses.
48
Define ecology.
The study of interactions between organisms and their environment.
49
What are biotic factors?
Living components of an ecosystem, such as plants and animals.
50
What are abiotic factors?
Non-living components of an ecosystem, such as water and temperature.
51
True or False: Ecosystems can be small, like a pond, or large, like a forest.
True
52
What is an ecosystem?
A community of living organisms interacting with their physical environment.
53
What is the role of producers in an ecosystem?
They convert solar energy into chemical energy through photosynthesis.
54
What is a food chain?
A linear sequence of organisms through which nutrients and energy pass.
55
What is biodiversity?
The variety of life in a particular habitat or ecosystem.
56
Fill in the blank: The __________ is a hierarchical system that classifies organisms.
taxonomy
57
What is a habitat?
The natural environment where an organism lives.
58
What is an ecological niche?
The role and position a species has in its environment.
59
True or False: All organisms in an ecosystem have a specific niche.
True
60
What is carrying capacity?
The maximum number of individuals an environment can sustain.
61
What is the difference between a food web and a food chain?
A food web consists of multiple interconnected food chains.
62
What is an invasive species?
A non-native species that disrupts the ecosystem it invades.
63
What is the greenhouse effect?
The trapping of heat in the Earth's atmosphere by greenhouse gases.
64
What are the main components of the carbon cycle?
Carbon fixation, respiration, decomposition, and combustion.
65
Fill in the blank: __________ is the process by which water vapor turns into liquid water.
Condensation
66
What is primary succession?
The development of an ecosystem in an area where no soil exists.
67
What is secondary succession?
The recovery of an ecosystem after a disturbance that does not destroy the soil.
68
What is an autotroph?
An organism that produces its own food, typically through photosynthesis.
69
What is a heterotroph?
An organism that cannot produce its own food and must consume others.
70
True or False: All organisms can be classified as either autotrophs or heterotrophs.
True
71
Fill in the blank: __________ are organisms that break down dead organic material.
Decomposers
72
What is the purpose of a keystone species?
To maintain the structure of an ecological community.
73
What is an ecosystem service?
Benefits provided by ecosystems to humans, such as clean water and pollination.
74
What is the role of a predator in an ecosystem?
To control the population of prey species.
75
What is the significance of genetic variation?
It increases the adaptability and survival of a species.

Biology (3 decks)

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