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Chemistry and the biogechemical cycles
biochem unit exam 11.15.12
42
Biology
9th Grade
11/15/2012

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Term

Identify that includes all of the most essential elements found in living organisms.

Definition
  • carbon
  • nitrogen
  • oxygen
  • hydrogen
Term
Isotopes are atoms that have different (...?)
Definition
nuetrons
Term
molecules that share electrons equally are said to have a :
Definition
Nonpolar covalent Bond
Term
The bond that holds various water molecules toghether is called a:
Definition
Hydrogen bond
Term
Water is polar due to the fact that its oxygen is (...)
Definition
more electronegative (stronger) than hydrogen.
Term
Trees depend on which property of water to help transport water and nurients form their roots to their leaves
Definition
High cohesive forces
Term
Which of te following regarding the strcture of water best explains why water is less dense as a solid than a liquid?
Definition
the arrangement of molecules
Term
(H+) compounds are likely to result in a pH of:
Definition

less than 7 

 

Acidic

Term
The indicator is the
Definition

pigment chemical that changes color indicating pH level.

 

Term
organisms that break down organic material to inorganic material
Definition
Decomposers
Term
nitrifying bacteria are responsible for converting ______ to nitrate.
Definition
Ammonia
Term

This if responsible for putting fixed nitrogen back into the atmosphere 

 

Definition
Denitrifying bacteria
Term
Gaseous water vapor is converted into liquid water during which process?
Definition
Condensation
Term
Respiratoin, Decompostition, and Combustion are all proccesses that return carbon to ...
Definition
the atmosphere
Term
Animals use nitrogen for
Definition
Proteins
Term
plants are directly involved in the water cycle when they perform
Definition
Transpiration
Term
combustion has a major impact on which cycle
Definition
Carbon
Term
A pH of <7 will result in a _______ compound.
Definition
Basic
Term
A pH of 7 will result in a ______ compound
Definition
Nuetral
Term
A pH of >7 will result in a ______ compound
Definition
Acidic
Term

[image][image]

The bond in this Water molecule is the...

Definition
polar covalent bond
Term

[image]

The dotted line is the bond called a ...

Definition
Hydrogen Bond
Term

[image]

Name this, give bond name, what molecule is it, which stage is it in, and its monomers

Definition
  • Polypetide chain
  • Peptide Bond
  • A protien in its Primary structure
  • Amino acids are the monomers
Term

[image]

 

This is a _____. Monomers? Function?

Definition
This is a starch. Its monomers are glucose and it is found in plants like potatoes to store energy.
Term

Ice is less dense than water.

 

Explain how the structure of water influences each property

 

Significance for life

Definition

The Hydrogen Bonds

 

Life can occur under ice.

Term

Low viscosity

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Small molecules

 

Water moves through very small spaces, capillaries.

 

Term

Liquid at room temperature

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Hydrogen Bonds

 

Gives liquid for living

Term

Colerless with high transmission of visible light.

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Small, Stable molecule, no excitable electrons

 

Light penetrates tissues and aquatic enviroments.

 

Term

Universal solvent

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Hydrogen bonds, Polar, small molecules

 

Makes solutions possible to create

Term

High heat of fussion

 

Explain how the structure of water influences each property

 

Significance for life

Definition

hydrogen bonds

 

Contents of cells are unlikely to freeze.

Term

high heat of vaporization

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Hydrogen Bonds

 

Cools down molecules modrates tempature.

Term

High surface tension

 

Explain how the structure of water influences each property

 

Significance for life

Definition

Close attraction between water molecules, and Hydrogen Bond

 

Allows small organisms to walk across it

Term

Enzymes epeed up chemicals reactions by

 

Definition
lowering the activaition energy of the element.
Term

[image]

This is the _____ ___ model

Definition
Induced fit model
Term
3 impoirtant characteristics of enzymes are
Definition

They are specific

 

They are efficient

 

They are sensitive to Tempurature and Ph

Term
Dehydration sythisis
Definition
Bonding process where you REMOVE a H2O molecule
Term
[image]
Definition

this is a phospholipid

 

2 fatty acids

1 Glyserol

1 Phosphate

Term
[image]
Definition

Simple lipid

 

3 fatty acid

1 glycerol

Term
[image]
Definition

This is a sterol

 

3 six-sided ring

1 five-sided ring

1 alchahol

Term
4 major macromoleecules are
Definition

Fats

Carbohydrates

Protiens

DNA

Term

[image]

This is ____. Its monomer is a ____.

Definition

DNA

 

 

 

Nucleotide

Term
[image]
Definition
Amino Acids
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