Chapter 7 Biology

Who used a compound microscope to see chambers within cork and named them "cells"?

• Anton van Leeuwenhoek

• Mathias Schleiden

• Robert Hooke

• Rudolf Virchow

Electron Microscopes can reveal details

• only in specimens that are still alive

• about different colors of cell structures

• of cell structures only once they are stained

• 1000 times smaller than those visible in light microscopes

Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?

• the cell lacks cytoplasm

• the cell lacks a cell membrane

• the cell lacks a nucleus

• the cell lacks genetic material

Which of the following is NOT found in the nucleus?

• mitochondria

• nucleolus

• chromatin

• DNA

Which organelle breaks down organelles that are no longer useful?

• Golgi Aparatus

• Lysosome

• Endoplasmic Reticulum

• mitochondria

Which sequence correctly traces the path of a protein in the cell?

• ribosome, endoplasmic reticulum, Golgi Aparatus

• ribosome, ER, chloroplast

• ER, lysosome, G.A.

• Ribosome, G.A., ER

Which organelle converts the chemical energy stored in food into usable energy?

• chloroplast

• G.A.

• ER

• Mitochondria

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

• breaks down lipids, carbs, and proteins from foods

• Regulates the movement of materials into and out of cell

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• carbs

• lipids

• bilipids

• proteins

Diffusion occurs because

• molecules are attracted to one another

• molecules constantly move and collide with each other

• cellular energy forces molecules to collide with each other

• cellular energy pumps molecules across the cell membrane