OCR Gateway A Combined Science B2 Flashcards
What is the basic unit of life?
The cell.
True or False: Prokaryotic cells have a nucleus.
False.
Fill in the blank: The process by which plants convert sunlight into energy is called _______.
photosynthesis.
What is the function of the mitochondria?
To produce energy (ATP) through cellular respiration.
Which organelle is responsible for protein synthesis?
Ribosome.
Multiple Choice: Which of the following is a function of the cell membrane? A) Support B) Protection C) Regulate what enters and exits the cell D) All of the above
D) All of the above.
What is the role of chlorophyll in photosynthesis?
To absorb sunlight.
True or False: DNA is found in the nucleus of eukaryotic cells.
True.
What is the purpose of mitosis?
To produce two identical daughter cells for growth and repair.
Fill in the blank: _______ is the process by which cells divide to form gametes.
Meiosis.
What is the primary function of the ribosomes?
To synthesize proteins.
Multiple Choice: Which of the following is not a type of tissue? A) Epithelial B) Connective C) Neural D) Organ
D) Organ.
What is an ecosystem?
A community of living organisms interacting with their environment.
True or False: All living organisms require oxygen to survive.
False.
What is the term for a group of similar cells that perform a specific function?
Tissue.
Fill in the blank: The _______ system is responsible for transporting nutrients and oxygen throughout the body.
circulatory.
What is homeostasis?
The maintenance of a stable internal environment in an organism.
Multiple Choice: Which of the following is a biotic factor in an ecosystem? A) Temperature B) Water C) Plants D) Soil
C) Plants.
What do we call the variety of different species in a given area?
Biodiversity.
True or False: Genetic variation is important for the survival of a species.
True.
What is the primary purpose of the nervous system?
To coordinate and control the body’s responses to internal and external stimuli.
Fill in the blank: The _______ is the part of the brain responsible for regulating vital functions such as heartbeat and breathing.
medulla oblongata.
What is the role of enzymes in biological reactions?
To speed up chemical reactions by lowering the activation energy.
Multiple Choice: Which of the following is a renewable resource? A) Coal B) Oil C) Solar Energy D) Natural Gas
C) Solar Energy.
What is the function of the large intestine?
To absorb water and form waste.
True or False: All cells in the body contain the same DNA.
True.
What is the primary function of the immune system?
To protect the body against pathogens.
