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Biology Test 2
ECU General Biology Class- Andrews
73
Biology
Undergraduate 3
09/24/2011

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Cards

Term
What is Energy?
Definition
The Capacity to do work on matter.
Term
What are the Energy Laws?
Definition
Energy cannot be created nor destroyed.
With every energy transformation, some energy is converted into heat.
Term
How are Energy Laws important to organisms?
Definition
Every cell must take in energy and use it for cellular work. We have to take in energy from somewhere and convert it into a usable form.
Term
What is a Chemical Reaction?
Definition
A Rearrangement of atoms between molecules.
Term
What do chemical reactions have to do with energy?
Definition
It's how we produce or change the energy into a more usable form. For example, photosynthesis and cellular respiration
Term
Define endergonic.
Definition
If the product molecules contain MORE chemical bond energy than the reactant molecules, then energy input is required for the reaction. (small molecules being built up into big molecules require energy.)
Term
Define Exorganic.
Definition
if the product molecules contain MORE chemical bond energy than the reactant molecules, then energy input if required for the reaction. (Large molecules breaking down into small molecules and gives off energy.)
Term
Define enzyme.
Definition
Proteins that catalyze chemical reactions (speed up chemical reactions)
Term
Define substrate.
Definition
a reactant molecule that is bound to an enzyme. (what they are called while they are attached to an enzyme)
Term
Define Active Site.
Definition
The location where a reactant molecule binds to an enzyme. (reactive molecules attach to enzyme)
Term
Define Denaturation
Definition
If an enzyme (or any protein) has it's shape changed is is called denatured and cannot perform it's functions. (shape is changed so much that it does not function right)
Term
What makes an enzyme specific for a chemical reaction?
Definition
every single chemical reaction in a cell needs an enzyme to catalyze it.
Term
define metabolism
Definition
The sum of all chemical reactions that occur within a cell or an organism.
Term
Define Metabolic Pathway.
Definition
A series of chemical reactions where the products of one chemical reaction are used as the reactants of the next. (product of 1st reaction is used as a reactant of the next.)
Term
Why does denaturation disable an enzyme?
Definition
Changes the pH.
Changes in the temperature.
Changes the order of the amino acids of the protein.
Term
What is the formula for photosynthesis?
Definition

 

6CO2+12H2O=> C6H12O6+6O2+6H2O

Term
What is the formula for cellular respiration?
Definition

C6H12O6+602=> 6CO2+6H2O

 

Term
What is the function of the Electron Transport System (ETS)?
Definition
A series of molecules in a membrane that transfers an electrons along the membrane, releasing a little of the Electron's energy at each step. It's the most efficient way to harvest electron energy for cellular work.
Term
Define Reactants.
Definition
The molecules that present before a chemical reaction occurs.
Term
Define Products.
Definition
The molecules that are present after a chemical reactions occurs.
Term
Why are ATP and ADP Important to living Organisms?
Definition
It's how we make or utilize energy.
Term
What kind of organic molecule is an enzyme?
Definition
protien
Term
How does an enzyme catalyze a chemical reaction?
Definition
They are specific. Enzymes are only able to catalyze one specific type of chemical reaction.
Term
Does ADP or ATP stores energy for cellular work?
Definition
ATP
Term
In what organelle of Eukaryotic Cells is ATP made using the Electron Transport system?
Definition
Mitochondria
Term
At What stage and under what conditions does fermentation occur?
Definition
It occurs in Glycolysis II. Fermentation depends upon the presence or absence of oxygen. If there is no oxygen then fermentation occurs.
Term
How is fermentation important to the life of the cell?
Definition
Frees NAD so that glycolysis may continue.
Term
how do people make use of fermentation?
Definition
It's used when making alcohol. Baking any leavened foods,gaining energy with out oxygen. Aerobic classes.
Term
What causes our muscles to become sore?
Definition
Fermentation in your muscles from lack of oxygen produces lactic acid, making your body less efficient.
Term
What process produces the substance that causes soreness?
Definition
Fermentation.
Term
Are other foods besides carbohydrates used to make ATP?
Definition
Lipids and Protiens
Term
Do they go through glycolysis?
Definition
yes
Term
Why do we need to breathe? What are we getting from the air, and what do we use it for? Why do we breather harder when we exercise?
Definition
We need to breathe so we can perform cellular respiration, which allows us release energy from the food we eat. We get Oxygen from the air and it's used in anaerobic respiration. we are going through glycolysis fast enough.
Term
Why is photosynthesis important for plants?
Definition
It's the metabolic pathway that enables producers to make their own food (glucose) using carbon dioxide, water, and light energy.
Term
Why is photosynthesis important for organisms that cannot do it?
Definition
the was product produced from it, Oxygen, is used in cellular respiration which nearly all living organism perform.
Term
How is energy trapped by photosynthesis transferred to non- photosynthesizing organisms?
Definition
When it's eaten. We in turn, use it eat our food.
Term
Does photosynthesis require energy? Why? What is the source of that energy?
Definition
Yes, The energy is what enabled the plants to strip their food to make energy they can use. Sunlight.
Term
Why is chlorophyll necessary? What does it do?
Definition
Green pigment that is chlorophyll captures the light. The electrons in chlorophyll are excited by light energy. These electrons are moved into an ETS where their energy is harvested to make chemical bonds.
Term
What is the role or ATP in photosynthesis?
Definition
ATP made during the lights dependent reaction supplies the energy to build glucose.
Term
Does photosynthesis produce ATP for cellular work? Why does it produce ATP?
Definition
Yes. It supplies the energy used to build glucose.
Term
What is the final energy rich product of
photosynthesis?
Definition
Food
Term
What colors of light are useful for photosynthesis and why?
Definition
Red, Blue, and Violet. Just right amount of energy to excite electrons and cause something to happen.
Term
What colors of light are useful for photosynthesis and why?
Definition
Red, Blue, and Violet. Just right amount of energy to excite electrons and cause something to happen.
Term
Define Mitosis.
Definition
increases the number of multicellular organisms, replaces old or damaged cells,and produces new organisms (asexual reproduction)
Term
Define Mitosis
Definition
increases the number of cells, replaces old or damaged cells, produces new organisms (asexual reproduction).
Term
How do daughter cells compare to the original parent cell?
Definition
they mirror the parent cell.
Term
Interphase
Definition
G1 phase - Cellular growth
S Phase- DNA Replication
G2 Phase- Cellular Growth and preparation for cell division
Term
Mitosis (Prophase)
Definition
chromosomes are condensed and the nuclear envelop is broken apart. Spindle apparatus forms and migrates to opposite poles of the cell.
Term
Mitosis (Prometaphase)
Definition
microtubules from the spindle aparati attach to the centromere of each chromosome.
Term
Mitosis- Metaphase
Definition
Microtubules align all chromosomes at the equator of the cell.
Term
Mitosis- Anaphase
Definition
Microtubles shorten (condense), this separates the replicated chromosomes and pulls each copy to an opposite pole of the cell.
Term
Mitosis- Telophase
Definition
(opposite of prophase) a new nuclear envelope forms around each set of chromosomes, the two spindle apparati break parts, the chromosomes uncoil and lengthen.
Term
Cytokinesis
Definition
the physical separation of the cell into two different cells.
Term
What is a chromosome?
Definition
long molecule of DNA with protein molecules bound to it.
Term
What is a sister chromatid?
Definition
each half of a replicated chromosome
Term
What is a centromere?
Definition
constriction that holds sister chromatids together.
Term
Define Haploid
Definition
-one set of chromosomes
Term
Define Diploid
Definition
two sets of chromosomes
Term
Define Polyploid
Definition
three or more sets of chromosomes.
Term
Define Homologous chromosomes
Definition
chromosomes that are the same size with a centromere in the same location, and carry the same sequence of genes.
Term
Fertilization
Definition
the joining of the different gametes
Term
define zygote
Definition
the diploid fertilized egg, which results from the union of a sperm cell nucleus and an egg cell nucleus.
Term
Define Gamete
Definition
a sex cell; a haploid egg or sperm. The union of two gametes of opposite sex fertilization produces ZYGOTE.
Term
define sperm
Definition
A male gamete
Term
define egg.
Definition
a female gamete.
Term
Is a zygote one cell or two?
Definition
one cell.
Term
When (in Meiosis I or Meiosis II) are copies of one chromosome separated?
Definition
Meiosis II
Term
When (in Meiosis I or Meiosis II) are homologous chromosomes separated?
Definition
Meiosis I
Term
What is the function of meiosis in the life cycle of an organism?
Definition
creates individual variation so we don't have 12 types of people out there.
Term
Why is it necessary to reduce the chromosome number?
Definition
because the daughter cell can only take 1/2 the chromosomes from each parent.
Term
Making sperm is a straightforward meiosis with four daughter cells. How is egg production (oogenesis) different?
Definition
The division is unequal. Only one egg is produced. Many different delays.
Term
Sexual reproduction
Definition
Reproduction with at least two different organisms contributing to the genetic code of the offspring.
Term
Asexual reproduction
Definition
the creation of genetically identical offspring by a single parent, without the participation of sperm and egg.
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