Biology 1st Semester Review Part 1 Biomolecules Enzymes DNA 2024

Front

What does the cell theory state about the origin of cells?

Back

Cells can only come from other, pre-existing cells.

Front

What cellular activity is affected first if ribosomes are destroyed?

Back

Protein production.

Front

What type of solution causes a plant cell to lose water?

Back

Hypertonic.

Front

What is an enzyme?

Back

A biological catalyst that works in living cells to speed up chemical reactions.

Front

How do enzymes affect activation energy?

Back

Enzymes help speed up reactions by lowering the activation energy needed.

Front

What is the specificity of enzymes?

Back

Enzymes are very specific to the substrates they bind with.

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are responsible for protein synthesis.

Front

What is the difference between hypertonic and hypotonic solutions?

Back

Hypertonic solutions have a higher solute concentration than the cell, causing water to leave the cell; hypotonic solutions have a lower solute concentration, causing water to enter the cell.

Front

What is the function of DNA in cells?

Back

DNA stores genetic information and provides instructions for protein synthesis.

Front

What is the structure of DNA?

Back

DNA is a double helix made of nucleotides, which include a sugar, phosphate group, and nitrogenous base.