Unit 2 test Review

Cells

Which cell structure contains the cell’s genetic material and controls

many of the cells activities?

• Organelle• Nucleus• Cell envelope• cytoplasm

Cells fall into two broad categories, depending on whether they

• Have a cell wall• Contain chloroplasts• Have a nucleus • Contain genetic material

Eukayotes usually contain:

• Genetic material• Specializec organelles• A nucleus• All of the above

Which of the following is NOT found in the nucleus?

• Nucleolus • chromatin• Cytoplasm• DNA

Which structures carry out cell movement?

• Chromosomes• Microtubules and microfilaments• Nucleolus• cytoplasm and ribosomes

Which organelle breaks down compounds into small particles that

the cell can us?

• Golgi apparatus• lysosome• Endoplasmic reticulum• Mitochondrion

Which organelle makes proteins using coded instructions that

come from the nucleus?

• Golgi apparatus• Mitochondrion • Vacuole• Ribosome

Which organelle converts the chemical energy stored in food into

compounds that are more convenient for the cell to use?

• Mitochondria• Endoplasmic reticulum• Golgi apparatus• chloroplast

Which of the following is a function of the cell membrane?

• Breaks down lipids, carbohydrates, and proteins from foods

• Regulates which materials enter and leave the cell

• Keeps the cell wall in place• Stores water, salt, proteins and

carbohydrates

Diffusion occurs because:

• Molecules constantly move and collide with one another

• Molecules never move or collide with one another

• The concentration of a solution is never the same throughout a solution

• The concentration of a solution is always the same throughout a solution.

An animal cell that is surrounded by fresh water will burst because the

osmotic pressure causes

• Water to move into the cell• Water to move out of the cell• Solutes to move into the cell• Solutes to move out of the cell

The cells of multicellular organisms are:

• Not dependent on one another• Specialized to perform particular functions• simpler than those of unicellular

organisms• Smaller than those of unicellular

organisms.

Who was the first person to identify and see cells?

• Anton van Leeuwenhoek• Matthias Schleinden• Robert Hooke• Rudolf Virchow

The thin, flexible barrier around a cell is called the

• Cell wall• Cell envelope• Cytoplasm• Cell membrane

Prokaryotes lack

•Cytoplasm•A nucleus•Genetic material•A cell membrane

Which of the following contain a nucleus?

•Bacteria•Organelles•Eukaryotes•Prokaryotes

The main function of a cell wall is to

• Store DNA• Support and protect the cell• Direct the activities of the cell• Help the cell move

Which of the following is a function of the nucleus?

• Controls most of the cell’s processes• Contains information to make proteins• Stores DNA• All of the above

Which of the following is a function of the cytoskeleton?

• Contains DNA• Helps keep the cell in shape• Surrounds the cell• Helps make proteins

Which of the following is an organelle found in the cytoplasm?

• Ribosome• Nucleolus• Chromatin • Cell wall

Which organelle would you expect to find in a plant cells?

MitrochondriaChloroplastRibosomeSmooth endoplasmic reticulum

Which of the following structures serves as the cell’s boundary from

its environment?

• Chloroplast• Channel proteins• Cell membrane • Mitochondrion

Diffusion is the movement of particles from

• An area of low concentration to an area of high concentration

• An area of equilibrium to an area of high concentration

• An area of high concentration to an area of low concentration

• All of the above

The diffusion of water across a selectively permeable membrane is

called

• Osmosis• Osmotic pressure• Facilitated diffusion• Active transport

Which term refers to cells having different tasks in an organism?

•Multicellular•Cell specialization•Unicellular•Levels of organizaton

Mathching: Know the functions of these organelles:

• Nuclueus• Mitochondria• Free ribosomes• Vacuole• Endoplasmic

reticulum• nuceolus

• Golgi apparatus• Chloroplast• Centrioles• Lysome• Cytoskeleton• Cell wall

Answers to matching• Assembles proteins• Powerhouse: creates

energy• Storage• janitor: contains

enzymes for digestion• Assembles lipid

components of cell membrane

• Formation of ribosomes• Capture energy from the

sun

• Maintain shape• Organize cell division• Modify, sort, and package

proteins• Provide support and

protection for plant cell• Contains genetic material

for cell instructions.