Biology Fall Semester Exam- 2

Front

What is the primary difference between viruses and bacteria?

Back

Viruses are much smaller than bacteria cells.

Front

How does the cell membrane contribute to homeostasis?

Back

By regulating the transport in and out of the cell.

Front

What is the process of transporting molecules from high to low concentration called?

Back

Diffusion.

Front

Which enzyme is responsible for unzipping DNA strands during replication?

Back

Helicase.

Front

What is the RNA codon complementary to the DNA sequence 3’-GCA-5’?

Back

CGU.

Front

Define homeostasis in biological systems.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment.

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.

Front

Explain the role of enzymes in biological reactions.

Back

Enzymes act as catalysts to speed up chemical reactions without being consumed in the process.

Front

What is the significance of the semi-permeable membrane?

Back

It allows certain molecules to pass while blocking others, crucial for maintaining cellular homeostasis.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.