AEBI 120 Lecture Notes - Active Transport, The Membranes, Microtubule

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periwinkleminnow302

29 Sep 2011

School

McGill University

Department

Biology (Agric & Envir Sc)

Course

AEBI 120

Professor

Gary Dunphy

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AEBI 120 Full Course Notes

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Document Summary

Semi-permeable, allowing active transport (using atp) to occur. Recognize cells of the same type (recognition proteins) Peroxidase and catalase will break down hydrogen peroxide, amino acids and fatty acids. Membrane-bound recycling centre with more than 40 types of enzymes. 10 types of carbohydrases 15-20 types of protease, 5-10 types of lipases. Help to resist disease (macrophages digest pathogenic bacteria) Digest damaged organelles so that the molecules can be reused. Has 2 membranes (the inner membrane is highly convoluted, creating cristae where acetyl- Coa is broken down and atp is produced) Fibres attached to the cell membrane contract, creating pseudopodia (which also begin phagocytosis) Composed of the globular protein tubulin which forms a tube structure. Centrioles (organizing centre) at base give rise to microtubules. Double membrane with a highly convoluted inner membrane. Serves as a control centre for all of the cells functions. The membranes can fuse together and dissolve, creating nuclear pores.

Related Questions

Argue whether respiration and photosynthesis are example ofsecondary active transport or not.

orangelouse46

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.

During active transport in the neuron, the outside of the cell is _________________ and the inside is _______________.

positive, negative

more positive, less positive

more negative, less negative

negative, positive

In active transport, _____________ provides the energy to move molecules against their concentration gradient.

nucleus

potassium

sodium

adenosine triphosphate

________________ proteins can change shape when moving substances across the membrane.

Proteins that can be open or closed, based on different conditions, are called ___________.