Cells

How would you explain the meaning of a generalized cell to a classmate

A group of cells with the same parts

The external faces of some membrane proteins have sugar attached to them. What are the 3 roles these sugar-coated proteins play in the life of a cell.

Allows biological membranes to reseal themselves. Makes it relatively impermeable. Helps keep the membrane fluid.

Define cell and organelle.

Cell: structural units of all living things Organelles: are the metabolic machinery of the cell

What is the special function of gap junctions? Of tight junctions?

Gap junctions allow communication. Tight junctions bide the cells to form a leakproof sheet

Describe the general structure and function of the plasma membrane.

It is a fragile, transparent barrier that contains all the cells contents and separates them from the surrounding environment.

Which two organelles are sacs of enzymes, and what is the function of each of these organelles.

Lysosomes contain powerful digestive enzymes that digest worn-out or not usable cell structures and most foreign structures that enter the cell. Peroxisomes use molecular oxygen to detoxify a number of harmful or poisonous substances including alcohol and formaldehyde.

Which organelle is the major site of ATP synthesis. Which packages proteins?

Mitochondria is the major site of ATP synthesis. The golgi apparatus packages proteins

Define Cell

Structural units of all living things

How do chromosomes relate to chromatin ?

The chromatin threads and condense to form dense rode like bodies called chromosomes?

According to the cell theory what the organisms can do depends on

The collective activities of the cell

How do the cytosol and the cytoplasm differ?

The cytoplasm is a fluid substance that contains many of the organelles. The cytosol contains other substances.

Why do phospholipids organize into a bilayer tail to tail in a watery environment

The inside is hydrophobic and the outside is hydrophilic

What is the general function of nucleoli

Where ribosomes are formed

Name the 3 basic parts of a cell, and give the location of each.

nucleus which is found near the center cytoplasm which surround the nucleus and the plasma membrane which surrounds the cytoplasm