Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Question 1: What does not occur in RNA processing? Question 2: What is the distance between the two genes?
The common antibiotic, erythromycin, binds reversibly to the large subunit of the bacterial ribosome. However, the antibiotic does NOT bind to the active site.What kind of inhibitor is erythromycin?
An allosteric activator will increase enzyme activity through which of the following mechanisms? a. Binding the enzyme and enhancing the Vmax b. Binding the enzyme, and keeping it in the "T" con
Discuss the principle of motor unit recruitment. Understand the relationship between motor unit recruitment and strength. Understand recruitment and the ‘size principle'.
Question 1: Identify the structure of the thick and thin filaments and be able to relate that structure to the function provided. Question 2: Explain the sliding filament mechanism of muscle contrac
Where are gap junctions commonly found? a. single-unit smooth muscle only b. multi-unit smooth muscle only c. cardiac muscle only d. both single-unit smooth muscle and cardiac muscle
Which of the following is NOT a property of glycolytic fibers as compared to oxidative fibers? a. high capacity for lactic acid production b. fewer capillaries c. absence of myoglobin d. poor ability
Which of the following best describes the relationship between motor neuron size, motor unit size, and order of recruitment?
What is a motor unit? a. all the muscle fibers in a fascicle b. all the myofibrils in a muscle cell c. a motor neuron and all the muscle fibers it innervates d. a spinal nerve and all the muscle fiber
What is the function of the T-tubules? a. they store calcium b. actin and myosin are activated here c. they conduct action potentials from the sarcolemma to the interior of the muscle cell d. they pro
Contraction of skeletal muscle fibers is stimulated by _____. a. autonomic neurons b. sympathetic neurons c. motor neurons d. parasympathetic neurons
What is the protein component of the thin filament that binds to calcium thereby initiating skeletal muscle contraction? a. myosin b. tropomyosin c. troponin d. titan
Question 1: Distinguish between negative and positive feedback control. Question 2: Understand the importance of the difference between lipophobic and lipophilic chemical classifications.
Question 1: What is meant by half-life of a chemical messenger? Question 2: Distinguish between up and down regulation.
Question 1: Name and understand the processes of passive transport and what factors affect rate of diffusion. Question 2: Explain the sodium/potassium pump.Question 3: Explain pinocytosis and phagocyt
What are the main classes of large biological molecules? What are the building blocks for each class of biological molecules? Why are some people lactose intolerant? Mention one benefit and one advers
Ben made a solution containing 68.46 g of sucrose in 0.75 L of water. The molar mass of glucose is 342.30 g/mol. Question: What is the solute in the resulting solution? What is the solvent in the solu
Which of the following organisms is most closely related to a lungfish? Clams, Earthworms, Mosquitoes, Humans Sea stars
A 45-year old woman admitted with severe abdominal pain died within a few hours of pancreatitis. Examination of the mesentery indicated white chalky deposits. These are most likely related to: A. ca
A 77-year old man died of severe congestive heart failure. On autopsy, the mitral valve was found to be the cause of the problem. The changes in the valve were the result of... A. calcifications B.
What is the free energy of lactose breakdown? Assume that G' is -10 kcal/mol for this reaction. Type your calculations in the box below.
A patient is in the hospital with bacterial meningitis. The doctor needs to determine whether the patient has an infection with Neisseria meningitis or Haemophilus influenzae.
Question 1: Why is the buffer's ability to maintain a constant pH limited to the addition of a specific amount of acid or base? Question 2: How do buffers neutralize acids and bases?
Question 1: How does the eukaryotic cell cycle relate to mitotic cell division? Question 2: What is the biological significance of buffers?
A temperate bacteriophage has the gene order x1 x2 x3 att x4 x5. What is the gene order of the prophage?