Science Exam Review

1. Organisms rely on both negative feedback processes and behavior to maintain

• homeostasis

• adaptation

• ecosystems

• evolution

Which of the following is a major principle upon which cell theory is based?

• All cells form by free-cell formation

• All cells have DNA

• All organisms are made of cells

• All cells are eukaryotic

If you do not understand a direction or part of a lab procedure, you should?

• Figure it out as you do the lab

• Try several methods until something works

• Ask the instructor before proceeding

• Skip it and go to the next part

Which organelle is the storehouse for most of a cell's genetic information?

• mitochondrion

• chloroplast

• centriole

• nucleus

Which phrase best describes rough ER?

• connected to the Golgi apparatus

• studded with ribosomes

• protected by vesicles

• stored in the central vacuole

Which organelle supply energy to the cell?

• robosomes

• centrosomes

• mitochondria

• vacuoles

Which organelle contains enzymes that break down old cell parts?

• centrosomes

• lysosmes

• vacuoles

• chloroplasts

Which organelle is unique to plant cells?

• centrosomes

• vacuoles

• ribosomes

• chloroplasts

A protein that detects a signal molecule and performs an action in response is called a

• receptor

• ligand

• vesicle

• proton

A solution that is hypotonic to a cell has

• more solutes than the cell

• fewer solutes than the cell

• the same concentration of solutes as the cell

• too many solutes