IRAT #1 Flashcards
Consider the example of blood pressure homeostasis. If a person’s blood pressure drops, Which of the following would be the sensor?
A. Skeletal Muscle
B. Brain
C. Sweat glands
D. Sympathetic Neurons
E. Baroreceptors
E. Baroreceptors
Which statement about macromolecules is true?
A. Proteins are the simplest level strings of fatty acids joined by the covalent bonds.
B. Carbohydrates are polymers of simple sugars and are an important source of energy.
C. Triglycerides at the simplest level are strings of amino acids joined by hydrogen bonds
D. Glucose is the building block of lipids which are used to store energy.
E. Amino acids joined together by peptide bonds from the
B. Carbohydrates are polymers of simple sugars and are an important source of energy.
The central dogma of molecular biology states that :
A. DNA is translated into mRNA in the nucleus and is transcribed into proteins on the ribosomes.
B. RNA is transcribed into DNA in the nucleus and is translated into proteins on ribosomes.
C. DNA is transcribed into mRNA on ribosomes and is translated into DNA in the nucleus.
D. DNA is transcribed in the mRNA in the nucleus and is translated into protein ribosomes.
E. RNA is translated into DNA on ribosomes and is transcribed into proteins in the nucleus.
D. DNA is transcribed in the mRNA in the nucleus and is translated into protein ribosomes.
which directions does this reaction need to proceed to restore equilibrium, assuming equilibrium, assuming equilibrium is equal amounts of substrate and product?
A. To the left
B. To the right
A. To the left
A high number of pH scale means :
A. there is a low concentration of hydrogen ions and the solution is acidic
B. there is a low concentration of hydroxide ions and the solution is alkaline
C. there is a low concentration of hydrogen ions and the solution is alkaline
D. there is high concentration of hydroxide ions and solutions is acidic
C. there is a low concentration of hydrogen ions and the solution is alkaline
Which of the following correctly describes a catabolic reaction ?
A. Glycogen is converted to glucose by gluconeogenesis
B. Glucose is converted to glycogen by glycogenolysis
C. Proteins is converted to amino acids by proteolysis
D. Glucose is converted to glycogen by glycogenesis
E. Fatty acids are converted to lipids by lipogenesis
C. Proteins is converted to amino acids by proteolysis
Which of the statements below is true about movements of molecules across membranes ?
A. Glucose moves into working cells by simple diffusion
B. Oxygen moves from the blood to the ISF by simple diffusions
C. Carbon dioxide leaves working cells by secondary active transport
D. Sodium ions are removed from cells by simple diffusion
B. Oxygen moves from the blood to the ISF by simple diffusions
The following reactions is an example of :
A. Substrate phosphorylation
B. Oxidative phosphorylation
A. Substrate phosphorylation
B. Oxidative phosphorylation
Water moves into cells by osmosis( diffusions of water), Which means it moves
A. From low to high water concentration or low to high solute concentration
B. From high to low water concentration or high to low solute concentration
C. From high to low water concentration or low to high solute concentration
D. From low to high water concentration or high low solute concentration
C. From high to low water concentration or low to high solute concentration
Which of the following would be a likely consequence of diafenthiuron poisoning?
A. Increased rate of oxidative phosphorylation increased production of lactic acid.
B. reduced rate of oxidative phosphorylation increased population of lactic acid.
C. Increased production of reduced coenzymes and increased oxidative phosphorylation.
D. Decreased rate of substrate phosphorylation increased production of lactic acid
B. reduced rate of oxidative phosphorylation increased population of lactic acid.
