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WorksheetsExam 2 review
Total questions: 40
Worksheet time: 21mins
What is lactase?
A disaccharide made in mammalian stomach cells
A disaccharide made in mammalian small intestinal cells
An enzyme made in mammalian stomach cells
An enzyme made in mammalian small intestinal cells
What DOES NOT happen when a person who is lactose intolerant consumes lactose?
Lactase is not present to break down the lactose
Lactose is broken down by lactase
The person will have digestive problems
Bacteria will use the lactose and create gas through fermentation
Which of the following students is most likely to be lactose tolerant?
Emily, who is English
Isabella, who is Native American
Naomi, who is Korean
Eric, who is Japanese
If lactase is present, lactose is __________ to glucose and galactose
dehydrated
hydrolyzed
cohered
adhered
The polymer of a carbohydrate:
Phospholipid
Polypeptide
Polysaccharide
Polyethylene
The polysaccharide responsible for structure in plants:
Chitin
Glycogen
Starch
Cellulose
Which of the following is NOT a difference between glucose and fructose?
Fructose is much sweeter
They have different chemical formulas
Excess fructose is stored as fat more often
Fructose is only used by liver cells
When High Fructose Corn Syrup is manufactured, starch is ________ into glucose monomers
Hydrolyzed
Dehydrated
Saturated
Hydrogenated
When you feel full, it is because ________ is being released by your fat cells
Testosterone
Estrogen
Insulin
Leptin
Leptin resistance:
When your brain is desensitized to the leptin signal
When your brain is sensitive to the leptin signal
Can cause you to lose a lot of weight
Your cells don't get the signal to uptake sugar
What is the recommended daily intake of sugar?
20-22 teaspoons/day
6-9 teaspoons/day
3-5 teaspoons/day
10-12 teaspoons/day
The structure of carbohydrates is similar to:
straight straws / bendy straws
a mickey mouse head
a train
coil / accordion
Unifying trait of lipids:
Hydrophilic
Hydrophobic
Hemophobic
Claustrophobic
Which of the following is NOT a major category of lipids?
Fats
Phospholipids
Phosphates
Steroids
______ reactions occur to make a triglyceride from monoglycerides
Dehydration
Hydrolysis
Hydrogenation
Saturation
Triglycerides structure:
C skeleton of 4 fused rings
1 glycerol + 2 fatty acids + phosphate
1 glycerol + 3 fatty acids
Depends on R group interactions
What is NOT TRUE about saturated fats?
They are solid at room temperature
They do not have double bonds
They are liquid at room temperature
They are comparable to straight straws
Trans fats are manufactured via:
Dehydration
Hydrolysis
Hydrogenation
Adding enzymes to unsaturated fats
Which is NOT a function of fats:
Structure
Insulation
Cushion vital organs
Long-term form of energy storage
Phospholipid heads are:
Hydrophobic
Hydrophilic
Hemophilic
Hemophobic
Phospholipids make up our cells:
Permeable membrane
Semi-permeable membrane
Cell wall
Cytoplasm
Cholesterol is the precursor for many _________
Proteins
Hormones
Fatty acids
Amino acids
The structure of steroids is _________
A train of monosaccharides
A chain of hydrogens and carbons
C skeleton of 4 fused rings + varying groups
2 fatty acids + glycerol + phosphate
A monomer of a protein:
Amino acid
Polypeptide
Monosaccharide
Nucleotide
There are ____ amino acids found in the human body
1000's of
only 20
only 5
100
The tertiary structure of proteins is due to:
Backbone interactions
The unique sequence of amino acids
The association of multiple polypeptides
R group interactions
The quaternary structure shape of hemoglobin is:
Fibrous
Globular
Alpha helix
Beta pleated sheet
All amino acids have a/an ________ with 4 components attached to it
Glycerol
Central carbon
Phosphate
R group
Which of the following is NOT affected in sickle cell anemia
Function of the red blood cell
Shape of the red blood cell
Amino acids sequence
Size of the red blood cell
Lactase is a _______, Lactose is a _______
carbohydrate, enzyme
enzyme, carbohyrate
enzyme, lipid
carbohydrate, nucleic acid
Which of the following is a similarity between DNA and RNA?
Both are double stranded helixes
Both consist of bases: Cytosine, Guanine, Adenine, and Thymine
Both backbones consist of alternating sugars and phosphates
Both have oxygen associated with the second carbon
Which of the following is a monomer of nucleic acids?
Amino acid
Nucleotide
Monosaccharide
Polypeptide
Which of the following is NOT a part of a nucleotide:
Sugar
R group
Phosphate
Nitrogenous base
___ DNA nucleotide(s) code for ___ amino acid(s)
2, 2
4, 1
1, 3
3, 1
The function of DNA is:
To store hereditary information
To transmit hereditary information
To translate hereditary information
To transport hereditary information
In RNA nitrogenous bases,
Uracil replaces Guanine
Thymine replaces Adenine
Uracil replaces Thymine
Thymine replaces Guanine
If DNA nucleotides code for one incorrect amino acid, what can happen?
Nothing, it's not that big of a deal
You can become leptin resistant
The RNA will stop transcribing
It can severely alter the function of a protein
Palm oil is:
The cause of icebergs melting in the north pole
Destroying many rainforests and endangering many species
A hydrogenated trans fat
Helping rebuild rainforests
In class, we used ________ to represent the structure of proteins
Straws
Ping pong balls
Magnets
Food labels
Where on a food label will you find the sugar present in the food?
Under "Total Calories"
Under "Total Fat"
Under "Sodium"
Under "Total Carbohydrates"
