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Cytology 2 Biology Chapter 4
These are the terms for Chapter 4
55
Biology
10th Grade
11/03/2008

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Term
Autotroph
Definition
Any organism that can produce its own food
Term
Heterotroph
Definition
Any organism that needs to eat other organisms for food
Term
Producer
Definition
The common word for Autotroph
Term
Consumer
Definition
The common word for heterotroph
Term
Organic carbon
Definition
Carbon in the form of sugar or any other carbon bearing macromolecule
Term
Inorganic carbon
Definition
Carbon in carbon dioxide
Term
ATP
Definition
The energy molecule you use for all cell processes
Term
ADP
Definition
This is the ATP molecule when it is used, needs a P to become ATP again
Term
High Energy Bond
Definition
The 3rd bond in ATP, easily broken by the cell
Term
Photosynthesis
Definition
Turning CO2 and H2O into sugar and O2
Term
Priestley
Definition
He was the first person to describe photosynthesis
Term
Light-dependent Reaction
Definition
1st part of photosynthesis; separates water into H+ and O2
Term
Light-independent Reaction
Definition
2nd part of photosynthesis; adds H+ to CO to make Sugar
Term
Chloroplast
Definition
Green organelle used in photosynthesis
Term
Cholorphyll
Definition
The excitable molecule in the chloroplast; light causes its electrons to split water
Term
Grana
Definition
The membrane stacks inside a chloroplast
Term
Stroma
Definition
The liquid part of a chloroplast
Term
Calvin Cycle
Definition
The dark reaction or light-independent reaction; attaches H+ to CO
Term
Photolysis
Definition
Splitting water into H+ and free O2
Term
NADP
Definition
The carrier molecule to H+ in photosynthesis
Term
RuBP
Definition
Combines with CO2 to form PGA
Term
PGA
Definition
The precursor to PGAL in C3 Photosynthesis
Term
PGAL
Definition
The precursor to sugar
Term
Sugar
Definition
The final product of photosynthesis; glucose or fructose, organic carbon
Term
C3 Photosynthesis
Definition
The most common form of photosynthesis
Term
C4 Photosynthesis
Definition
Corn and crab grass does this form of photosynthesis; uses 2 cells and has Malate as a precursor to PGAL
Term
CAM Photosynthesis
Definition
This form of photosynthesis is done by plants in the desert; uses Malate as a precursor to PGAL but separates light and dark reactions by day and night
Term
Stomata
Definition
The openings on a leaf or plant that allow CO2 in and O2 and H2O out
Term
Malate
Definition
The precursor to PGAL in C4 and CAM photosynthesis; has 4 carbon molecules in it
Term
Succulent
Definition
Desert plant with thick waxy coating; if it has needles, it is a cactus
Term
Chemosynthesis
Definition
Some bacteria do this instead of photosynthesis; happens when bacteria use chemical energy to make sugars
Term
Cellular Respiration
Definition
Combining sugar and oxygen to release ATP
Term
Mitochondria
Definition
The organelle for cellular respiration
Term
Glycolysis
Definition
Breaks sugar into 2 molecules of pyruvate; anaerobic
Term
Kreb’s Cycle
Definition
This reaction cycle strips off carbon and hydrogen from pyruvate; 1st aerobic part of cellular respiration
Term
Electron Transport Chain
Definition
This reactions transfers hydrogen to oxygen to make water during respiration; 2nd aerobic part of cellular respiration, yields 38 ATP
Term
Anaerobic Respiration
Definition
Respiration without oxygen
Term
Aerobic Respiration
Definition
Respiration with oxygen
Term
Pyruvate
Definition
One half of a sugar molecule; made during glycolysis
Term
FAD & NAD
Definition
Hydrogen carriers for respiration
Term
Lactic Acid Fermentation
Definition
This anaerobic reaction changes pyruvate into lactic acid; this produces the burning sensation in your muscles when they are tired
Term
Alcoholic Fermentation
Definition
This anaerobic reaction changes pyruvate into alcohol; often done by yeast or bacteria
Term
Yeast
Definition
Unicellular (one-celled) fungi that do alcoholic fermentation
Term
Translation
Definition
RNA--> Protein; making protein from RNA
Term
Codon
Definition
Three letter code on mRNA
Term
Anticodon
Definition
Three letter code on tRNA
Term
Ribosome
Definition
Protein factory
Term
START Codon
Definition
This codon initiates translation
Term
STOP Codon
Definition
This codon terminates translation
Term
Amino Acid
Definition
The building block of a protein; carried by tRNA
Term
Catabolic
Definition
Reactions that break molecules down; digestion, hydrolysis and cellular respiration
Term
Anabolic
Definition
Reactions that build molecules up; photosynthesis and dehydration synthesis
Term
Hydrolysis
Definition
Reverse of dehydration synthesis; inserts water into a large molecule to break it into smaller parts
Term
Dehydration synthesis
Definition
Removing water to make a large molecule
Term
Digestion
Definition
Generic term to describe the breakdown of any larger molecule
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