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Cell Structure

The integrity of the plasma membrane is essential for cellular survival...

1. Answer three of the following five questions in a 3-4 page summary. The integrity of the plasma membrane is essential for cellular survival. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? How might cells of the immune system disrupt membranes of foreign cells? (Two hints: virtu

Osmosis, diffussion and cell membrane

I am trying to compare process osmosis and diffussion and how does the two process help a plant leaves remain firm? 2. How exactly does a cell membrane structure related to its function?

Pathways Respiration is the featured topic.

Of the pathways in respiration, which one produces the least energy? The Next least? The Most? How do you know this, and why is this important to the environement we live in (ie on Earth?)? Ideas are presented.

4 Biology Problems

1. The integrity of the plasma membrane is essential for cellular survival. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? How might cells of the immune system disrupt membranes of foreign cells? (Two hints: virtually all cells can secrete proteins, and some proteins form pores in

Monera and protista

Please answer the attached questions on monera and protista. --- LAB 14- B 1- To what extent would filamentous cyanobacteria be considered multicellular? 2- Which of the following words or phrases describes the heterotrophic bacteria, the cyanobacteria, both or neither? a. lack of nuclear envelope b. photosynthesize si

It would be helpful if you have done cellular labs

Please answer the following questions (attached). --- LAB 4-A 1- What do you think is the function of the appendages extending from the nerve cells? 2- What three organelles (or structures) can you view in the elodea leaf cells, but not in the mammalian nerve cells? 3- Does Spirostomum have a cell wall? How do you kn

Must know all different types of microscopes

Please answer the following short questions (as brief as possible) This is for my study guide. --- 1A LAB 1- If an ocular lens has a magnifying power of 15X and the objective lens is 10X what is the total magnification? 2- Identify the part of the microscope with the following functions: a. Lens that further magnifi

Eukaryotic Cell and Organelles

If a eukaryotic cell has a diameter that is 10 times that of bacteria cell, proportionally how much more surface would the eukaryotic cell have? Proportionally how much more volume would it have? How does the nucleus control protein synthesis in the cytoplasm? How does a mitochondron and a chloroplast look like? I ne

Genetics

How is programmed death of cells (apoptosis) used during embryonic development and in fighting cancer?

Plasma membrane

Give the term for the plasma membrane pulling away from the cell wall.

Biological Membranes

I need a clear and detailed explanation on biological membrane characteristics such as biochemical properties (eg. composition, alignment, special features, etc.), biological transport routes and mechanisms of transport, and the properties of integral and peripheral proteins.

GAP JUNCTIONS for Multicellular Organisms

As multicellular organisms decelop from embryo to adults, gap junctions are made and broken in specific patterns, involving specific tissues. This suggests that these junctions play an important role in signalling between cells during embryonic development. A) With the understanding of Gap junctions, speculate on what sorts

Signal pathway comparison

Consider the signalling pathway that proceeds through three protein kinases that are sequentially activated by phosphorylation. IN one case the kinases are held in a signalling complex by a scaffolding protein; in the other, the kinases are freely diffusing (see figure attached). Discuss the properties of these two types of orga

Transport vesicles, secretory vesicles, and endocytotic vesicles

Whats the difference between transport vesicles, secretory vesicles, and endocytotic vesicles? I know that Transport vesicles move molecules between locations inside the cell. For example they move proteins from the ER to the Golgi, from there to the outer membrane, where they are secreted

the location of ribosomes

You prepare radioactivley labelled ribosomal subunits and you microinject them into cells that you are culturing in the laboratory. At different times after you inject the subunits, you take a small amount of cells and analyze them by electron microscopy. You find very soon after injection, the labelled subunits are assembled in

Immune System Functionality and the Plasma Membrane

The integrity of the plasma membrane is essential for cellular survival. a. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? b. How might cells of the immune system disrupt membranes of foreign cells?

Parts of a Cell: Organelles

Choose the component of the cell that you think is most essential to the cell as a whole. Describe why you feel this way. Defend your choice.

Size of cell based on picture is determined.

You have been given a picture of a cell; the magnification of the picture is 8000 X. The cell in this picture is 2 cm in length. Based on the information provided, what is the actual size of the cell? Show all relevant calculations. (Express answer in micrometers) Ideas are then presented.

DNA mRNA Role of a Coenzyme

Consider the role of the coenzyme NAD in glucose oxidation. In the process of glycolysis the formation of pyruvate involves the reduction of the coenzyme NAD to NAD.2H. (a) Which other stages of glucose oxidation produce molecules of the reduced coenzyme, NAD.2H? (b) Explain what happens to NAD.2H produced during glycoly

Cell Structure and Function

1. Which of the following organelles is most important in providing energy to the cell? (a) mitochondrion (b) centrosome (c) Nucleus (d) Peroxisome 2. Name the membrane valves that open and close for potassium efflux and sodium influx. (a)ion channels (b)Vacuoles (c)Capillaries 3. What technique can be used to measu