You place a RBC (0.9%) into a 5% sugar solution. Which statement below is false? The RBC is hypotonic to the 5% solution
Which is an example of a sensor in a negative homeostatic feedback loop? Chemoreceptor in carotid body
For membrane fluidity experiment, the part of the experiment that actually validated that the membrane was fluid was: The labeled antibodies of the human and mouse intermixing
An example of primary active transport would be a protein requiring ATP to transport sodium ions across the plasma membrane. True
If a red blood cell is put in a solution and it hemolyzes, then the solution is considered to be: Hypotonic
If your body temperature goes too high you can denature enzymes in your body. True
What does an integrator do in a homeostatic pathway? Measures the signal coming in to a set point and send a signal out to the body
Which of the following represents stages of the cell division (mitosis) in the proper sequence? Prophase, metaphase, anaphase, telophase
Which is not true for proteins? They are comprised of mostly cellulose
What would be a disturbance for blood glucose homeostasis (normal blood glucose set point = 77mg/dL)? A permanent decrease in insulin production from the Islets of Langerhans
Dr. Bio measures your total cholesterol and he reports back to you that your level is 300 mg/ 100 ml of plasma. You do what? Eat more oatmeal and flax to increase your HDL level.
How do you make an unsaturated fatty acid? Perform a dehydration synthesis reaction on a saturated fatty acid
Which is false for antioxidants? They speed up reactions in your body
Which molecules do not dissolve in water? Non-polar
Which molecule requires a transport protein to get through the plasma membrane (either channel or carrier protein)? Two of the answers are correct
Interphase is considered to be part of normal cell division (mitosis). False
What is the function of ATP? All of the answers are correct
What are the three kinds of lipids? Triglycerides, phospholipids, and steroids
When glycerol combines with 3 fatty acids to form a triglyceride (fat), which of the following chemical reactions has occurred? Dehydration Synthesis
How can you alter a protein’s shape? More than one answer is correct
If a red blood cell is put into a solution and it maintains its shape, then the solution is considered to be: Isotonic
Which molecule requires some type of transport protein to get through the plasma membrane? Sodium Ion
Cofactors are molecules that activate enzymes. Which is not a cofactor? Mercury
The nitrogenous bases found in DNA have complementary paring. Which pair is correct? C-G
Which is not true for meiosis? Results in a gamete that is 2N
In the diagram below the two solutions are separated by a semi permeable membrane. In which direction will net movement of water occur? From side A to side B
Which is not a component of a DNA molecule: Ribose Sugar
Phospholipids are similar to fatty acids except for? Phospholipids have a phosphate group
Which is not true for cells? They allow diffusion of all molecules
If you combine a molecule of glucose and fructose, which statement is true? You have formed sucrose
Which is true for enzymes? Activity will increase until the enzyme becomes saturated
What method would you use to get glucose into a cell along/down it’s concentration gradient (from high to low)? Facilitated Diffusion
Which is not considered an integrator in a negative homeostatic feedback loop? Pancreas
Which phase of the cell cycle is where cytokinesis takes place? Telophase
What vitamin do we produce by sitting in the sun; it aids in calcium absorption from the small intestine? Vitamin D
Why is it important to think about ion dissociation in the body? All the above
In what order do you use macromolecules for fuel? Carbohydrates, lipids, proteins
Which is false for cholesterol? It can dissolve in water/blood
You place a RBC (0.9%) into a 0.5% sugar solution. Which statement below is false? The RBC is hypertonic to the 0.5% solution
Which is not a membrane protein function? Protein synthesis
Ingesting (eating) excess hydrophilic vitamins, such as vitamin C, results in excess vitamin C being stored in your tissues. False
Diffusion is: The movement of molecules from an area of high molecular concentration to an area of low molecular concentration across a selectively-permeable membrane
The hormone responsible for glucose uptake/removal from the blood is: Insulin
What method would you use to get sodium ions into a cell against sodium’s concentration gradient (from low to high concentration)? Active Transport
Which phase of the cell cycle is where the cell is functioning normally or doing its job? Interphase
Evidence for mitochondria once being bacteria that our cells engulfed is: It has it’s own DNA
Ionic molecules (ie NA+, K+) can diffuse straight through the plasma membrane. True
What is the difference between cis and trans fatty acids? Cis fatty acids have hydrogens on the same side of the carbon double bond and trans fatty acids do not
Cofactors are molecules that activate enzymes. Where do we get cofactors from? Vitamins found in fruits and vegetables
RNA has what nitrogenous base in place of thymine? Uracil
Large polar molecules (ie glucose) can diffuse straight through the plasma membrane? False
Which lipoprotein is comprised of more protein and less cholesterol so it scavenges for cholesterol in the blood? High density lipoprotein
A normal human being has 46 chromosomes (23 pairs/2N/diploid) in each somatic cell (body cell). True
The three main compounds digested by the digestive system are? Fats, carbohydrates, and proteins
Meiosis is the process in which our sex cells go from 46 chromosomes to 23 single chromosomes. True
The effector in any negative feedback loop is usually: An organ/tissue
If a red blood cell is put into a solution and it crenates (shrinks), then the solution is considered to be: Hypertonic
Which statement is false for glycogen? It is a disaccharide
Enzymes aid in digestion by? Lowering the energy required to break food apart
Nonpolar molecules (ie CO2) can diffuse straight through the plasma membrane
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