Multiple Choice: Nervous system of cell biology

Answer the multiple choice questions. Explain the reason. 1. The most common adhesive glycoprotein in humans is: a. integrin c. fibronectin b. collagen d. hyaluronin 2. Action potentials are transmitted along axons without a loss of a. amplitude b. K+ c. Na+ d. all of the above 3. Voltage-gated Na+ and K+ channels are refractory because of movement of a(n) a. channel inactivating segment b. gate segment c. inner vestibule segment d. outer vestibule segment 4. Neurotransmitters released into the synaptic cleft are a. in some cases degraded b. generally retrieved by a symport in the synaptic membrane of the presynaptic cell c. b... click for more

Cellular Respiration and Photosynthesis

Cellular respiration and photosynthesis co-exist as paired processes. Photosynthesis converts light energy into organic molecules such as carbohydrates. These molecules are picked up and utilized as fuel sources in organisms that employ cellular respiration for production of ATP and CO2. 1. Create a table comparing and contrasting the two processes. Include in your comparison variables such as organism type, energy source, cellular location, substrates/reactants/products, full and balanced chemical reaction, carrier molecules, and any other parameter you find relevant. 2. Apart from its essential role in cellular respiration, the mitochondrion is thought to be implicated in a variety... click for more

Cell reproduction cytokinesis in animal and plant cell

Evaluation: Cell Reproduction Differentiate the following terms and provide an image obtained from a book or the internet which clearly illustrates this term (reference your source). chromatin sister chromatids chromosome Differentiate between the process of cytokinesis in plant and animal cells. Provide an image from a text or the internet which clearly illustrates each of these processes (reference your sources). It was stated in the content that the mechanism by which the sister chromatids are drawn away from each other towards opposite poles of the cells by the spindle fibers, is unknown. describe and determine how cell biologists believe this occurs. Provide references... click for more

What is endosymbiosis?

Explain the relationship between ancient bacteria and cyanobacteria which lead to the formation of chloroplasts and mitochondria.

Cell Biology

1. Calmodulin a. is an ubiquitous protein in eukaryotic cells b. binds Ca2+ c. is a membrane bound protein d. a and b 2. All of the following properties about nitric oxide are true EXCEPT: a. is a gas b. is synthesized from O2 and arginine c. has a half-life of 2-3 minutes d. activates guanylyl cyclase 3. A gain-of-function in which of the following would promote malignancy in cells whose proliferation is inhibited by TGF? a. co-Smad b. I-Smad c. R-Smad d. all of the above 4. Which of the following receptors binds TGF? a. type I b. type II c. type III d. types I and II e. types II and III 5. Which of the following events occurs during the epinephrine... click for more