Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
How is a Disaccharide formed?
|
Two monosaccharides are linked covalently via dehydration (i.e., a DIMER)
|
|
|
What is the purpose of Polysaccharides?
|
Storage:
-glycogen (animal) -starch (plant) Structural: -cellulose -chitin -Bacterial cell wall |
|
|
What is cellulose?
|
Very stable, good for structural components.
|
|
|
What is Glycogen?
|
storage of glucose in animals
|
|
|
What is starch?
|
Storage of glucose in plants
|
|
|
The major carbohydrate-storage molecule in plants is:
|
Starch
|
|
|
The alpha helix is an example of what level of protein structure?
|
Secondary structure
|
|
|
The number of D-amino acids that occur naturally in proteins is:
|
Zero
|
|
|
In polysaccharides, sugars are linked together with ____ bonds.
|
Glycosidic
|
|
|
The major bonds in glycogen are:
|
Alpha glycosidic bonds
|
|
|
Fatty acids are stored in fat droplets in the form of:
|
Triglycerides (triacylglycerols)
|
|
|
Based on their structure, steroid hormones could theoretically be synthesized by symply chemically modifying:
|
Cholesterol
|
|
|
In the primary structure of a protein, amino acids are joined together by:
|
Covalent-peptide bonds
|
|
|
The interaction of the alpha and beta subunits to form the hemoglobin molecule is an example of:
|
Quarternary
|
|
|
What is involved in the forming of the tertiary structure of proteins?
|
H bonds
Hydrophobic interaction Ionic Bonds |
|
|
What makes lipids a good barrier?
|
Many biologically important molecules are not soluble in lipids.
|
|
|
What does it mean for something to be "hydrogenated"
|
The number of carbon-carbon double bonds in the oil were decreased.
|
|
|
What is the result of hydrogenating something?
|
The something is now solid at room temperature
|
|
|
If a portion of a phospholipid contains a phosphurus group that has one or more electric charges, that region is:
|
Hydrophilic
|
|
|
An organic molecule that is soluble in ether (an organic solvent) but is not soluble in water.
|
Lipids
|
|
|
The monomers that make up polymeric carbohydrates like starch are called:
|
monosaccharides
|
|
|
What formula do both Glucose and Fructose have?
|
C6H12O6
|
|
|
Glucose and Fructose are:
|
isomers
|
|
|
A simple sugar with the formula C5H10O5 is a:
|
Pentose
|
|
|
Lactose has one glucose unit and one galactose unit. Therefore it is a:
|
Disaccharide
|
|
|
What is the theoretical number of different proteins that you could make from a total of 50 naturally occuring amino acids?
|
20^50
|
|
|
What is the nucleotide sequence of the complementary strand of this DNA molecule: A A T G C G A
|
T T A G C C T
|
|
|
The backbone of nucleic acid molecules is made of:
|
alternating sugars and phosphate groups.
|
|
|
What portion of the polypeptide chain is responsible for establishing and maintaing the force that is used to stabilize secondary structure?
|
Carbonyl oxygens
|
|
|
How does the hydrogen bonding in alpha-helices differ from the hydrogen bonding in the beta strands of polypeptides?
|
alpha bonding is parallel to the axis of the polypeptide
|
|
|
A slight change in the pH environment surrounding a protein could affect the proteins':
|
1. amino acid sequence
2. overall shape 3. overall structure 4. function |
|
|
DNA and RNA contain:
|
Pentoses
|
|
|
Which nitrogenous bases represent a pyrimidine?
|
1. cytosine
2. thymine |
|
|
In forming a polynucleotide, which parts of the monomers link up via condensation?
|
sugar to phosphate
|
|
|
In double-stranded polynucleotides, which parts of the adjacent strands interact chemically and by what chemical process?
|
Base to Base; hydrogen bonding
|
