Flash cards on combined biology aqa gcse
What is the basic unit of life?
Cell
True or False: DNA is made up of amino acids.
False
Fill in the blank: The process by which plants make their own food is called __________.
Photosynthesis
What is the function of the ribosomes?
Protein synthesis
Which organelle is responsible for energy production?
Mitochondria
Multiple Choice: Which of the following is not a type of RNA? A) mRNA B) tRNA C) rRNA D) dRNA
D) dRNA
What is the genetic material found in all living organisms?
DNA
True or False: All cells have a nucleus.
False
Fill in the blank: The __________ is the control center of the cell.
Nucleus
What type of bond holds the two strands of DNA together?
Hydrogen bonds
Multiple Choice: What is the primary function of the chloroplast? A) Respiration B) Photosynthesis C) Digestion D) Protein synthesis
B) Photosynthesis
What is the name of the process by which cells divide?
Mitosis
True or False: Prokaryotic cells have a membrane-bound nucleus.
False
Fill in the blank: __________ are the building blocks of proteins.
Amino acids
What is the role of enzymes in biological reactions?
To speed up the reactions
Multiple Choice: Which of the following is a form of asexual reproduction? A) Binary fission B) Fertilization C) Budding D) Both A and C
D) Both A and C
What is homeostasis?
The maintenance of a stable internal environment
True or False: All living organisms require oxygen to survive.
False
Fill in the blank: The __________ system is responsible for the transport of nutrients and waste in the body.
Circulatory
What type of cell division produces gametes?
Meiosis
Multiple Choice: Which of the following is a function of the cell membrane? A) Protection B) Transport C) Communication D) All of the above
D) All of the above
What is the role of the small intestine in the digestive system?
Absorption of nutrients
True or False: The heart is part of the respiratory system.
False
Fill in the blank: __________ is the process of breaking down glucose to release energy.
Cellular respiration
What is a mutation?
A change in the DNA sequence
Multiple Choice: Which of the following is a characteristic of living organisms? A) Growth B) Reproduction C) Response to stimuli D) All of the above
D) All of the above
What is the primary pigment involved in photosynthesis?
Chlorophyll
True or False: All cells in an organism have the same DNA.
True
Fill in the blank: The __________ system is responsible for the body’s defense against infection.
Immune
What is the function of the kidneys?
To filter waste from the blood
Multiple Choice: Which organ is primarily responsible for detoxification? A) Heart B) Liver C) Lungs D) Kidneys
B) Liver
What is the role of the pancreas in digestion?
Produces digestive enzymes
True or False: The skin is the largest organ of the human body.
True
Fill in the blank: __________ are specialized cells that transmit nerve impulses.
Neurons
What is the function of red blood cells?
To transport oxygen
Multiple Choice: Which part of the brain is responsible for balance and coordination? A) Cerebrum B) Cerebellum C) Brainstem D) Hypothalamus
B) Cerebellum
What is the role of the endocrine system?
To regulate body functions through hormones
True or False: Hormones are produced by glands.
True
Fill in the blank: The __________ controls the body’s fight or flight response.
Adrenaline
What is biodiversity?
The variety of life in the world or in a particular habitat
Multiple Choice: What is a keystone species? A) A species that is not abundant B) A species that has a disproportionately large effect on its environment C) Any species in an ecosystem D) A species that is invasive
B) A species that has a disproportionately large effect on its environment
What is an ecosystem?
A community of living organisms and their environment
True or False: Energy flows through an ecosystem in a one-way stream.
True
Fill in the blank: __________ are organisms that produce their own food.
Autotrophs
What is the process of nitrogen fixation?
Conversion of nitrogen gas into ammonia by certain bacteria
Multiple Choice: Which of the following is a biotic factor in an ecosystem? A) Water B) Temperature C) Plants D) Soil
C) Plants
What is the role of decomposers in an ecosystem?
To break down dead material and recycle nutrients
True or False: The carbon cycle involves the movement of carbon through the atmosphere, biosphere, and geosphere.
True
Fill in the blank: __________ is the maximum population size that an environment can sustain.
Carrying capacity
What is natural selection?
The process by which organisms better adapted to their environment tend to survive and produce more offspring
Multiple Choice: What is the primary cause of extinction? A) Habitat destruction B) Overpopulation C) Climate change D) Pollution
A) Habitat destruction
What is the significance of the fossil record?
It provides evidence for evolution and the history of life on Earth
True or False: Genetic variation is important for the survival of a species.
True
Fill in the blank: __________ are inherited traits that help organisms survive in their environment.
Adaptations
What is the role of a scientific theory?
To provide a well-substantiated explanation of some aspect of the natural world
Multiple Choice: Which of the following is not a characteristic of life? A) Growth B) Response to stimuli C) Ability to reproduce D) Inability to adapt
D) Inability to adapt
What is the primary function of the skeletal system?
To provide structure and support to the body
True or False: The immune system is responsible for producing hormones.
False
Fill in the blank: __________ are the three main types of rocks: igneous, sedimentary, and __________.
Metamorphic
What is the role of the integumentary system?
To protect the body and regulate temperature
Multiple Choice: Which of the following is a function of the lymphatic system? A) Fluid balance B) Absorption of fats C) Immune response D) All of the above
D) All of the above
What is the main purpose of the respiratory system?
To exchange gases between the body and the environment
True or False: The diaphragm is a muscle that aids in breathing.
True
Fill in the blank: __________ is the study of how living organisms interact with one another and their environment.
Ecology
What is the primary role of the digestive system?
To break down food and absorb nutrients
Multiple Choice: Which part of the plant is responsible for water absorption? A) Leaves B) Roots C) Stem D) Flowers
B) Roots
What is the role of stomata in plants?
To regulate gas exchange
True or False: Plants are autotrophs.
True
Fill in the blank: __________ is the outermost layer of the skin.
Epidermis
What is the function of the myelin sheath?
To insulate nerve fibers and speed up impulse transmission
Multiple Choice: Which of the following vitamins is produced when skin is exposed to sunlight? A) Vitamin A B) Vitamin B12 C) Vitamin C D) Vitamin D
D) Vitamin D
What is the primary component of the cell membrane?
Phospholipids
True or False: All cells have the same organelles.
False
Fill in the blank: The __________ is responsible for the regulation of body temperature.
Hypothalamus
What is the significance of the cell cycle?
It regulates cell growth and division
Multiple Choice: Which stage of the cell cycle involves DNA replication? A) G1 B) S C) G2 D) M
B) S
