Bio Sem 1 Exam Review

Front

What is chemical energy?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, allowing the energy to be transported around the cell. Energy is the ability to do work and comes in various types such as light, mechanical, and chemical.

Front

What happens to dye droplets in a beaker?

Back

The dye droplets spread out from an area of high concentration to an area of lower concentration until they are evenly distributed throughout the beaker.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is passive transport that occurs with the help of proteins. It involves two types of proteins: channel proteins, which allow charged or larger molecules to flow through the membrane, and carrier proteins, which change shape to transport specific molecules across the membrane.

Front

What is the active site of an enzyme?

Back

The active site of an enzyme is the region where the substrate attaches, allowing bonds to be formed or broken to create a different molecule.

Front

In which direction does water move in a hypertonic solution?

Back

Water moves out of the cell when it is placed in a hypertonic solution.

Front

Define passive transport.

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What are channel proteins?

Back

Channel proteins are a type of transport protein that allow specific molecules or ions to pass through the cell membrane.

Front

What are carrier proteins?

Back

Carrier proteins are a type of transport protein that change shape to transport specific molecules across the cell membrane.

Front

What is a hypertonic solution?

Back

A hypertonic solution is one that has a higher concentration of solutes compared to another solution, leading to water moving out of cells placed in it.