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49 Cards in this Set

  • Front
  • Back

Define what a cell is technically.

small membrane enclosed units filled with componets and can reproduce thereselves.

What are the rules of the Cell Theory

All living things are made up of cells. All cells come from cells

What is Cell Biology

Study of cells structure, function, and behavior

How big is an typical bacterial and neural cell

A typical bacterial cell is about 2-5 micrometers. A typical neural cell is about 700 micrometers accross.

Proteins


Name all 5 functions

Chemical Catalysts, Structural Support, Molecular Motors, Defense, Storage.

How do proteins act in Defense

Immunoglobulin proteins produce Antibodies in response to foreign cells. By binding to target molecule inactivating it or marking it for destruction

How do proteins act as chemical catalyts

Enzymes are a protein that speed up chemical reactions

How do proteins give structural support.

As in the proteins in the connective tissue like collagen and elastin

How do proteins act as molecular motors

Motor proteins carry membrane enclosed organelles and cause cytoskeleton filaments to slide.

How do proteins function in storage

Storage proteins store metal ions and amino acids used by the organism,

What are the protein building blocks

Amino Acids

Describe Genome

Provides instructions for all cellular activities and behaviors. It is all of the DNA in a cell. Genetic Content or DNA controls proteins.

What was the first microscope and when was it invented

Light Microscope visible light is used to illuminate the specimen to view. Invented in the 1600s.

Describe the Electron Microscope and when was it invented

Beams of electrons was used to illuminate the specimen. Allowing to see more detail. Invented in the 1930s

Fundamental tools of Cell Biology

Electron and Light Microscope

Light Microscopy allows you to visualize?

Cell shape some structural componets and activities, and extracellular matrix

Name all of the types of Light Microscopes

Bright-ield, Phase-Contrast, Interference-Contrast, Fluorescence, Confocal.

Describe the Bright-field Microscope.

Light shined directly on the specimen, Dyes often required

Describe the Phase-Contrast Microscope

The bending of light as it passes through the specimen has an advantage. No dye required. Viewing of living cells easily achieved.

Describe the Interference-Contrast Microscope?

Similar to phase-Contrast Microscope

Describe Fluorescence Microscopy

Fluorescent dyes or tags are added to cell and illuminated with specific wavelengths of light.

Describe Confocal Microscopy

More defined resolotion than Fluorescence Microscopy. Lasers illuminate single planes of a specimen at a time to generate a final image.

Types of Electron Microscope

Transmission and Scanning

Describe the Transmission Electron Microscope

Good for viewing the inside of the cell. Specimen must be fixed in plastic, sliced, and stained with heavy metals.

Describe the Scanning Electron Microscope

Great for making 3-D images of the outside of the specimen. Outside of the specimen is coated with heavy metals and the electrons are bounced off specimen and focused by magnets.

Bacteria Vs Archaea

Similar in physical/outward appearance but chemicallly and genetically quite distinct,

In an Animal or plant cell what is the nucleus surrounded by?

double membrane known as the nuclear envelope.

Mitochondria membrane and DNA

Double membrane with inner membrane making folds into the interior of the organelle. Makes and houses its own DNA.

Carbon can form chains or rings. Has the ability to form how many covalent bonds.

Both and 4.

Chemical groups are

Added to organic compounds and are responsible for much of the reactions that organic molecules are involved in.

What are the 4 building blocks in cells.

Monosaccharides for polysaccharides. Fatty acids for lipds. Amino acids for proteins. Nucleotides for Nucleic Acids.

How are monomers joined and removed from Polymers.

Joined by condensation and removed by hydrolysis reactions.

Functions of sugar

Energy storage : Glucose in animals and Starch in plants. Structural support in plants as cellulose and chitin in fungi.

Fatty acid tails that are straight and bent

Straight= saturated Bent= Unsaturated

How many amino acids can be linked together

20

Monomers of Dna and RnA

ATP

How are monomers added together

Enzymes and repetitive reactions

Macromolecules and Non covalent bonds

Non covalent bonds give macromolecules or specifies its shape. And binds to other molecules

Enzymes can harvest energy to build order from

disorder

Define Entropy

Measure of disorder example is heat

First law of Thermodynamics

Energy is niether created or destroyed

Cells accomplish order through what metabolic reactions,

Photosynthesis and Cellular Respiration

How do energy enter living systems

Photosynthesis

How do cells get the energy from Photosynthesis

By oxidiziding the organic molecules from photosynthesis

define free energy

Energy required to do work or drive chemical reaction

Chemical reactions only occur in the direction that results in

Release of free energy and increase of entropy

Define Activation Energy

Energetically favorable/spontaneous reactions that require an input of energy to proceed,

Reactants need energy boosts in order to

Be converted into products

Why do enzymes and protein catalysts lower activation energy barriers

To facilitate reactions