which of the following macromolecules is primarily responsible for the insolubility of cell...

Which of the following macromolecules isprimarily responsible for the insolubility ofcell membranes in water? a. starchb. cellulosec. proteind. phospholipide. glycogen

Answer: d

All of the following are typical componentsof the plasma membrane of a eukaryoticcell EXCEPT

a. glycoproteinsb. cytochromesc. cholesterold. phospholipidse. integral proteins

Answer: b

1. Cell recognitioncomponent

2. Hydrophobicportion of protein

3. Cholesterol

4. Carrier for celltransport

Answer: A

Answer: D

Answer: E

Answer: B

Which of the following is an example of active transportacross a membrane?

a.The movement of water from a nephron into the collecting duct of the kidney.b. The movement of glucose by facilitated diffusion

into a liver cell.c. The movement of water from the inside of a cell into

a surrounding hypertonic medium.d. The movement of Na+ into a neuron as a nerve

impulse is generated.e. The movement of H+ into a thylakoid disc during

photosynthesis.

Answer: e

More unsaturated=More fluid

2003B- Water is important for all living things.The functions of water are directly relatedto its physical properties.

a) Describe how the properties ofwater contribute to the following:

•plasma membrane structure

2001- Proteins- large complex molecules- aremajor building blocks of all living organisms.Discuss the following in relation to proteins.

(c) The roles of proteins in membranestructure and transport of moleculesacross the membrane.

Transduction

Question #2: 1999

Communication occurs among the cells in a multicellular organism.Choose THREE of the following examples of cell-to-cell communication, and for each example, describe the communication that occurs and the types of responses that resultfrom this communication.

• Communication between two plant cells• Communication between two immune system cells• Communication either between a neuron and another neuron, or between a neuron and a muscle cell• Communication between a specific endocrine-gland cell and its target cell

Question #4: 2003

Death is a natural and necessary part of life cycles at all levels ofOrganization.

(a) Discuss TWO examples of how cell death affects thedevelopment and functioning of a multicellular organism.(b) Discuss ONE exmple of how substances are degradedand reused in cells.(c) Discuss the evolutionary significance of death.

Which of the following macromolecules isprimarily responsible for the insolubility ofcell membranes in water? a. starchb. cellulosec. proteind. phospholipide. glycogen

Answer: d

All of the following are typical componentsof the plasma membrane of a eukaryoticcell EXCEPT

a. glycoproteinsb. cytochromesc. cholesterold. phospholipidse. integral proteins

Answer: b

Which of the following is an example of active transportacross a membrane?

a.The movement of water from a nephron into the collecting duct of the kidney.b. The movement of glucose by facilitated diffusion

into a liver cell.c. The movement of water from the inside of a cell into

a surrounding hypertonic medium.d. The movement of Na+ into a neuron as a nerve

impulse is generated.e. The movement of H+ into a thylakoid disc during

photosynthesis.

Answer: e

1. Cell recognitioncomponent

2. Hydrophobicportion of protein

3. Cholesterol

4. Carrier for celltransport

Answer: A

Answer: D

Answer: E

Answer: B