Biology S1 Exam Review Set 1

Front

What is ATP and why is it important for cells?

Back

ATP (adenosine triphosphate) is the primary energy carrier in cells. It provides energy for various cellular processes by releasing a phosphate group, which can be recycled from ADP (adenosine diphosphate) to regenerate ATP.

Front

What biome is characterized by moderate temperatures, rainfall, and four distinct seasons?

Back

The deciduous forest biome is characterized by moderate temperatures and rainfall, supporting diverse wildlife such as raccoons and songbirds.

Front

What is the role of helicase in DNA replication?

Back

Helicase is an enzyme that unwinds and separates the double-stranded DNA helix at the replication forks, allowing for the replication process to occur.

Front

What is a limiting factor in an ecosystem?

Back

A limiting factor is a resource or condition that limits the growth, abundance, or distribution of an organism or a population in an ecosystem, such as insufficient magnesium for plant growth.

Front

What occurs during DNA replication?

Back

During DNA replication, the DNA strands are unzipped, matching nucleotides are shuttled in, and repair enzymes recognize and fix mistakes.

Front

Define photosynthesis and its importance to plants.

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is the function of chlorophyll in plants?

Back

Chlorophyll is a green pigment found in plants that absorbs light energy, primarily from the sun, to facilitate photosynthesis.

Front

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

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains in an ecosystem.

Front

What is the significance of biodiversity in an ecosystem?

Back

Biodiversity refers to the variety of life in an ecosystem, which contributes to resilience, stability, and the ability to adapt to changes.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are biological catalysts that speed up chemical reactions in cells by lowering the activation energy required for the reaction to occur.