BIOL 155 Lecture Notes - Lecture 25: Endoplasmic Reticulum, Endothelium, Isotopic Labeling

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BIOL 155 Lecture Notes - Lecture 2: Glycoprotein, Osmosis, Hydrolysis

BIOL 155 Lecture Notes - Lecture 3: Homeostasis, Micelle, Lipid Bilayer

BIOL 155 Lecture Notes - Lecture 25: Endoplasmic Reticulum, Endothelium, Isotopic Labeling

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Ubc biol 155 lecture 23 notes final exam review. Basic science questions: describe the fluid mosaic model of the cell membrane and use this model to discuss how water, ions and polar and non-polar molecules enter or leave cells. Describe the forces involved in each of these movements and how these processes are controlled. Finally, discuss the significance of this to the cell: describe the process of osmosis in terms of changes in free energy. Trace the path of the amino acids from start to finish: you examine liver cells of two individuals one of whom has been taking drugs for a long period of time. You notice that the liver cells of this individual show a proliferation of smooth endoplasmic reticulum. Basic science questions: streptomycin (an antibiotic) binds to the small ribosomal subunit of bacteria (but not to the ribosomes of the host cells infected by bacteria). The result is blocked initiation, misreading of mrna, and breakup of polysomes.

Related Questions

1,Match the descriptions to the type of transport.

- A. B. C.	Water enters a cell because it is hypertonic compared to the extracellular environment, increasing its turgor pressure
- A. B. C.	Water enters guard cells because the guard cells are hypertonic compared to the surrounding cells
- A. B. C.	Potassium ions are pumped into guard cells
- A. B. C.	The motor cells of a Venus fly trap are hypotonic compared to surrounding cells, causing water to leave the motor cells
- A. B. C.	Sugar is loaded into the phloem

A.	Both active and passive transport
B.	Passive Transport
C.	Active transport

2,Describe what is wrong with the following statement and explain why:

All prokaryotic and eukaryotic cells contain plasma membrane, nucleus, ribosomes, organelles, cytoplasm, and cell walls.

What is short-distance transport?

	a,	The movement of solutes from a region of low concentration to a region of high concentration
		b,The movement of water, nutrients, and other substances between cells
c,		The movement of substances from a region of high concentration to a region of low concentration
d,		The movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

What terms describe the movement of water across a semipermeable membrane from a region of high water concentration towards a region of low water concentration (and high solute concentration.)

What is found in the proptoplasm?

Cell wall, cytoplasm, plasma membrane, nucleus, and other cell organelles

Plasmodesmata, cell wall, and plasma membrane

Cell wall, cytoplasm, and plasma membrane

Cytoplasm, nucleus, and other cell organelles

The channels that allow nutrients and protoplasm to pass between plant cells are called _________________.

What happens when a plant cell is placed in a hypotonic solution?

Water will enter the plant cell and the plasma membrane will swell and cell lysis will occur

Water will leave the plant cell and the plasma membrane will pull away from the cell and plasmolysis will occur

Water will enter the plant cell and the plasma membrane will swell and push against the cell wall

Water will leave the plant cell and the plant cell will lose turgor pressure, causing the plant to wilt

________________ transport uses cellular energy.

What molecules make plasma cell membranes hydrophilic on the outside and hydrophobic on the inside?

What type of cells do plants have?

		Bacterial
		Archaeic
		Eukaryotic
		Prokaryotic

BIOL 110 Principles of Biology

1.Describe the structure of a plasma membrane.

2.Define an amphipathic molecule and give an example.

3.Explain the difference between integral and peripheral proteins.

4.Describe the fluid-mosaic model of a membrane.

5.Identify and discuss the function of proteins located in the plasma membrane.

6.Explain the difference between glycoproteins and glycolipids.

7.Why can carbon form chemical bonds with so many elements?

8.Explain the meaning of concentration gradient as it pertains to movement of substances into and out of cells.

9.Explain diffusion and osmosis.

10.What molecule is thought to facilitate the movement of water molecules through a plasma membrane?

11.Explain the difference between active and passive transport across the plasma membrane. Provide examples that occur in the human body.

12.Explain the impact to a cell if placed in a hypertonic solution; include a definition of hypertonic solution and why the change occurs.

13.Identify a similarity and difference between facilitated transport and active transport. Do not state that both move substances across the membrane.

14.Explain the sodium-potassium pump and identify the type of membrane protein involved.

15.Identify and explain the process used by cells to secrete substances.

16.Explain the composition of a plant cell wall and how it differs from the cell wall of a prokaryotic cell.

17.Explain the plasmodesmata and identify the kingdom in which they are found.

18.Define energy and identify the two basic forms of energy.

19.Define entropy.

20.Define metabolism.

21.Explain the difference between exergonic and endergonic reactions.

22.What are coupled reactions and what roles can ATP serve in these reactions?

23.Explain the difference between oxidation and reduction reactions.

24.What is energy of activation?

25.What factors affect the speed of enzymatic reactions?

26.What is an electron transport chain?

27.What occurs at the active site of an enzyme?

28.Define enzymatic inhibition.

29.Define chemiosmosis.

30.Define vitamins and identify their function.

What is meant by the terms peripheral membrane protein, integral membrane protein, and lipid-anchored protein? How is each type of protein attached to the cell membrane?

A) What is meant by the term âmembrane fluidity?â B) What factors influence this property of lipid bilayers?

C) How do these factors influence membrane fluidity?

Briefly describe the Fluid Mosaic Model of the cell membrane.

A) How do the proteins spectrin and ankyrin affect the lateral asymmetry of proteins in a cell membrane?

B) How do they affect the lateral asymmetry of phospholipids in the membrane?

11. Does membrane fluidity affect the function of integral membrane proteins?

What is meant by the term critical micelle concentration?

BIOL 155 Lecture Notes - Lecture 25: Endoplasmic Reticulum, Endothelium, Isotopic Labeling

BIOL 155 Lecture Notes - Lecture 2: Glycoprotein, Osmosis, Hydrolysis

BIOL 155 Lecture Notes - Lecture 3: Homeostasis, Micelle, Lipid Bilayer

BIOL 155 Lecture Notes - Lecture 25: Endoplasmic Reticulum, Endothelium, Isotopic Labeling

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