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
