Biology pre-lab 3

What is a cell?

Basic unit of life

The smallest unit of life that can function independently and perform all of the activities necessary for life is called a(n)

Blank 1: cell or cells

Which of the following are features all cells have in common?

Cytoplasm Plasma membrane

Osmosis involves which type of membrane transport?

Diffusion

How does rate of diffusion depend on the speed of molecular motion?

Directly; faster moving molecules result in faster diffusion.

While examining a cell under a microscope, you observe a nucleus, ribosomes, cytoplasm, and mitochondria. You are examining a _____ cell.

eukaryotic

Chloroplast

The location of photosynthesis in plants and some protists

Prokaryotic cells

Bacteria, Archaea

When comparing two full 1 liter bottles of solutions, which one contains more water: 5% glucose solution or 10% glucose solution?

5% glucose solution

Central vacuole

A large, fluid-filled sac for storing water and metabolites in plants

Which of the following distinctive structures do all cells have?

A plasma membrane

Which organelle or cell part is found in animal cells but not in plant cells?

Centrioles

Which organelles and cell parts are found in plant cells but not animal cells?

Chloroplasts Cell wall

A cell is placed in a 15% NaCI solution and the cell shrinks. How would you describe the solution?

Hypertonic

Mitochondria

Location of cellular respiration, which produces ATP

Which of the following are functions of the plasma membrane?

Location of organelles and other contents of cell Surrounds the cytoplasm Boundary between inside of cell and its environment

Rough endoplasmic reticulum

Network of membranes studded with ribosomes; plays a role in protein synthesis

Smooth endoplasmic reticulum

Network of membranes that is the site of lipid synthesis and detoxification

Which organelle functions as the control center of a eukaryotic cell?

Nucleus

What does it mean for a membrane to be semipermeable?

Only certain things can get through.

Eukaryotic cells

Protists, Animals, Fungi and plants.

A membrane allows glucose through but not sucrose and galactose. What type of membrane is this?

Selectively permeable

Solution 1 has a pH of 6.4, Solution 2 has a pH of 8.1, and Solution 3 has a pH of 4.8. Which solution has the highest concentration of hydrogen ions (H+)?

Solution 3

Which of the following statements correctly describes tonicity?

The ability of a solution to change the volume of a cell by osmosis.

What drives diffusion?

The random movement of molecules

Suppose you add solute molecules that are highly concentrated to water, and diffusion of the solute occurs very quickly. What will happen to the distribution of the solute after a long time?

The solute concentration will be the same everywhere.

Which of the following factors influence molecular speed?

Type of medium Temperature Molecular weight