Biology Semester 1 2024

Front

What type of bond is found between a carbon and phosphate atom in DNA?

Back

Covalent bond: A strong chemical bond formed when two atoms share electrons.

Front

What is a feedback mechanism in biological systems?

Back

Feedback mechanism: A process that uses the conditions of one component to regulate the function of another component, helping to maintain homeostasis.

Front

How does the environment affect the rate of photosynthesis?

Back

The rate of photosynthesis is influenced by environmental factors such as light intensity, temperature, and carbon dioxide concentration.

Front

What organelles are responsible for producing ATP energy in cells?

Back

Mitochondria: Organelles known as the powerhouses of the cell, where ATP (adenosine triphosphate) is produced.

Front

Which types of cells can perform photosynthesis?

Back

Plant cells, protists (like Euglena), and some bacteria are capable of photosynthesis.

Front

Define photosynthesis.

Back

Photosynthesis: The process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll: A green pigment found in plants that absorbs light energy, primarily from the sun, to drive the process of photosynthesis.

Front

What is homeostasis?

Back

Homeostasis: The ability of an organism to maintain a stable internal environment despite changes in external conditions.

Front

Explain the term 'organelles'.

Back

Organelles: Specialized structures within a cell that perform distinct processes necessary for the cell's life.

Front

What is the function of blood vessels in thermoregulation?

Back

Blood vessels can dilate (increase in size) to release heat when body temperature is high, aiding in thermoregulation.