Biology 1107 Test 1 - Dee's UGA With
Complete Solutions
Identify 9 characteristics that are common to all living things. - ANSWER 1.
Sensitivity/Response to the environment
2. Reproduction
3. Adaptation
4. Growth
5. Growth and Development
6. Regulation
7. Homeostasis
8. Energy Processing
9. Evolution
What does it mean when the characteristics of life refers to individuals or
populations? - ANSWER Characteristics like reproduction and evolution refer to
populations.
Other characteristics refer to individuals.
What are the properties of water that are important for supporting life? -
ANSWER 1. Different states in nature
2. Solvent
3. Lubricant
4. High heat capacity
5. Neutral ph
6. Cohesive and Adhesive
Explain how molecules of water interact with each other in the liquid state. -
ANSWER Water molecules are formed by strong polar covalent bonds.
, The molecules interact with other water molecules thru weak Hydrogen Bonds.
Determine how other molecules interact with water based on charge and
polarity - ANSWER In water polarity, a polar substance that dissolves in water is
hydrophilic ("water-loving") and a non-polar that does not interact in water/does
not dissolve in water is hydrophobic ("water-fearing").
Charges can form hydrogen bonds w/ water called a sphere of hydration. Also
ionic bonds are added to water and disrupted by dissociation which means
atoms or groups break off from molecules and form ions.
Differentiate dehydration and hydrolysis reactions in regards to molecules of
life. - ANSWER Dehydration ("the loss of water"): this reaction involves the
formation of new bonds and requiring energy.
- Marco-molecules are made from molecules
- Monomers form polymers (covalent bonds)
-By the release of water the reaction is called dehydration synthesis
Hydrolysis ("to split with water"): this reaction breaks bonds and releases
energy.
- Polymers broken down into monomers and are assembled by hydrolysis
-Polymers are broken into 2 parts: H+ (hydrogen atoms) & OH- (hydroxyl
molecule) from split water molecules
$TopHat$
A polymer composed of 100 monomers is produced through series of
dehydration reactions. How many molecules of water are generated as a result
of this process? - ANSWER 99 because for every 2 monomers you join, you loose
1 polymer 1 less bond than monomers
Describe the basic structure of amino acids and identify properties of amino
acids based on the structures of their R-groups. - ANSWER Def of Amino Acid:
monomers that bond to form polymers called polypeptides (a chain of amino
acids = polypeptide)
Basic Structure of Amino Acid:
-Amino group
-Carboxyl Group
-R group (diff. in each amino acid)
Explain how polypeptides are formed from bonding amino acids together -
ANSWER Amino acids are bonded by peptide bonds which form dehydration
reactions (and the formation of the bond is endergonic or requires energy)
Complete Solutions
Identify 9 characteristics that are common to all living things. - ANSWER 1.
Sensitivity/Response to the environment
2. Reproduction
3. Adaptation
4. Growth
5. Growth and Development
6. Regulation
7. Homeostasis
8. Energy Processing
9. Evolution
What does it mean when the characteristics of life refers to individuals or
populations? - ANSWER Characteristics like reproduction and evolution refer to
populations.
Other characteristics refer to individuals.
What are the properties of water that are important for supporting life? -
ANSWER 1. Different states in nature
2. Solvent
3. Lubricant
4. High heat capacity
5. Neutral ph
6. Cohesive and Adhesive
Explain how molecules of water interact with each other in the liquid state. -
ANSWER Water molecules are formed by strong polar covalent bonds.
, The molecules interact with other water molecules thru weak Hydrogen Bonds.
Determine how other molecules interact with water based on charge and
polarity - ANSWER In water polarity, a polar substance that dissolves in water is
hydrophilic ("water-loving") and a non-polar that does not interact in water/does
not dissolve in water is hydrophobic ("water-fearing").
Charges can form hydrogen bonds w/ water called a sphere of hydration. Also
ionic bonds are added to water and disrupted by dissociation which means
atoms or groups break off from molecules and form ions.
Differentiate dehydration and hydrolysis reactions in regards to molecules of
life. - ANSWER Dehydration ("the loss of water"): this reaction involves the
formation of new bonds and requiring energy.
- Marco-molecules are made from molecules
- Monomers form polymers (covalent bonds)
-By the release of water the reaction is called dehydration synthesis
Hydrolysis ("to split with water"): this reaction breaks bonds and releases
energy.
- Polymers broken down into monomers and are assembled by hydrolysis
-Polymers are broken into 2 parts: H+ (hydrogen atoms) & OH- (hydroxyl
molecule) from split water molecules
$TopHat$
A polymer composed of 100 monomers is produced through series of
dehydration reactions. How many molecules of water are generated as a result
of this process? - ANSWER 99 because for every 2 monomers you join, you loose
1 polymer 1 less bond than monomers
Describe the basic structure of amino acids and identify properties of amino
acids based on the structures of their R-groups. - ANSWER Def of Amino Acid:
monomers that bond to form polymers called polypeptides (a chain of amino
acids = polypeptide)
Basic Structure of Amino Acid:
-Amino group
-Carboxyl Group
-R group (diff. in each amino acid)
Explain how polypeptides are formed from bonding amino acids together -
ANSWER Amino acids are bonded by peptide bonds which form dehydration
reactions (and the formation of the bond is endergonic or requires energy)
