2024 AP Biology Fall Semester Exam Review

Front

What evidence is there that cell communication is a process that has evolved over billions of years?

Back

The process is similar in all forms of life on Earth.

Front

What are the structural differences between DNA & RNA?

Back

DNA is composed of two antiparallel strands, DNA pairs adenine with thymine while RNA uses uracil, and RNA contains the sugar ribose instead of deoxyribose.

Front

What does a compound need to have in order to be classified as organic?

Back

Carbon.

Front

What is the difference between passive and active transport?

Back

Passive transport moves molecules down their concentration gradient, while active transport requires the input of energy and moves molecules against the concentration gradient.

Front

What type of feedback loop works to reverse the change in a system?

Back

Negative feedback loop.

Front

Define cell communication.

Back

The process by which cells detect and respond to signals in their environment.

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are the sites of protein synthesis, translating messenger RNA into polypeptide chains.

Front

Explain the significance of the cell membrane's structure.

Back

The cell membrane is selectively permeable, allowing certain substances to enter or exit the cell while maintaining homeostasis.

Front

What is the function of enzymes in biological reactions?

Back

Enzymes act as catalysts, speeding up chemical reactions by lowering the activation energy required.

Front

Describe the process of photosynthesis.

Back

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