BIOL 104 Midterm: BISC 101 - Student Learning Objectives - Topic 3 - Cell Membrane Structure and Function

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22 Nov 2018

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List factors that can increase and decrease membrane fluidity. Differences between peripheral, integral and transmembrane proteins. List the six major functions of membrane proteins. The general function and location of membrane carbohydrates (location refers to either on the external side of membrane or on internal side of membrane) How lipid soluble molecules can pass through a cell membrane. How polar molecules (including ions) can pass through a cell membrane. Difference between carrier and channel transport proteins. What happens to animals cells when exposed to isotonic, hypertonic and hypotonic solutions. What happens to plant cells when exposed to isotonic, hypertonic and hypotonic solutions. Be able to list the differences between: passive and active transport, simple and facilitated diffusion, simple diffusion and active transport, facilitated diffusion and active transport. Be able to list similarities between simple diffusion and facilitated diffusion.

Related Questions

A set of erythrocytes is placed in a beaker of 0.9% NaCl.Nothing appears to happen to the cells. Why?

0.9% NaCl is hypertonic to the cells.

Sodium blocks the movement of water.

0.9% NaCl is hypotonic to the cells.

0.9% NaCl is iostonic to the cells.

water has not moved at all.

Question 2

Select one answer.

Which substance would be mostlikely to pass through a lipid bilayer/plasma membrane withoutembedded proteins?

water

a steroid hormone

a large fatty acid

a large peptide hormone

a sodium ion

Question 3

Select all that apply.

Which of the following can cross the cellâs plasmamembrane without the assistance of protein transporters?Select all that apply.

large polar molecules

positively charged ions

small hydrophobic molecules

gasses

Question 4

Select one answer.

Biological Membranesare:

symmetrical.

impermeable.

static.

dynamic.

Question 5

Select one answer.

How does the selectivepermeability of the membrane help the cell.

This allows the cell to maintain the proper shape.

This allows the cell to regulate what enters and exits

This allows the cell to maintain a constant temperature.

All of these

Question 6

Select one answer.

What is the role of carbohydratesin the plasma membrane?

cellular identification

adhesion

transport materials across the membrane

help maintain fluidity

Question 7

Select one answer.

Which component of the plasmamembrane has the widest variety of functions?

sterols

carbohydrates

phospholipids

proteins

Question 8

Select one answer.

All of the following have aneffect on the fluidity of a membrane except:

interactions among fatty acids in the core of the bilayer

the cholesterol content

the ratio of saturated to unsaturated fatty acids

the presence of integral proteins in the membrane

burgundyelk45

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.

Please keep it answer between 3to7 sentences. or keep it short.

1. Describe how the âfluid mosaicâ structural model of the cell membrane allows it to perform its function of being âselectively permeableâ.

2. For two of the following types of transport, describe the process itself, how the structure of the cell membrane functions in the transport of molecules, and the significance of each type to a cell. â¢ Facilitated diffusion â¢ Active transport â¢ Endo/Exocytosis

3. Describe the significance of hypotonic, hypertonic, and isotonic solutions to both animal and plant cells.

4. Energy transfers occur in all cellular activities. Explain this process and the role of ATP in cotransport.

5. Discuss the induced fit model of enzyme-substrate interaction. Include how substrate concentration, temperature changes, and competitive inhibition may affect that interaction. 6. Discuss the similarities and differences between the biochemical pathways of aerobic respiration and photosynthesis.

7. Membranes are important structural components of cells. Describe the role of membranes in the synthesis of ATP in both cellular respiration and photosynthesis.

BIOL 104 Midterm: BISC 101 - Student Learning Objectives - Topic 3 - Cell Membrane Structure and Function

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