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13 Dec 2019

Biologists commonly use cell fractionation to:

a -isolate organelles to examine their biological functions.

b -examine the distribution of organelles within the cell.
c-

sort cells based on their size and weight.
d-

visualize the 3-D structure of cell membranes.

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17 Dec 2019
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Related questions

Place the following in order from most complex to least complex

A- Cell B- Hydrogen C- Water D- Protons

31. C

32. B

33. A

34. D

Match the cell type with the most appropriate description or phrase

A- Prokaryotic B- Eukaryotic C- Both

36. Is the cell type that builds multicellular organism in Fungal, Plant, and Animal Kingdom.

B- Eukaryotic

37. Bacteria is an example of this cell type.

A- Prokaryotic

38. Contain Cytoplasm’s and cell membranes

B- Eukaryotic

39. Contain Membrane- bound organelles

C- Both

True or False

40. All cells contain a cell membrane, cytoplasm, and a nucleus.

False

41. According to the Cell Theory, all living things are composed of cells.

True

42. According to the Cell Theory, all living things use DNA as the genetic information molecule.

True

Part A.

Find 3 images of human cells from different organ systems. (Example, find images of liver, lung, and muscle cells).

Look at the cells and based on their morphology (structural features) try to explain how they might function in the tissue they represent.

Part B.

Use analogies to describe the function of two different organelles (Example, the mitochondria is like the battery of a cell)

The structure and general chemical composition of the cell membrane is similar to the membranes of organelles. True or false?

21. What is the proportion of H2N–CH2–COO–/+H3N–CH2–COO–at pH 9.6?

A) 100%/0%

B) 75%/25%

C) 50%/50%

D) 25%/75%

E) 0%/100%

44. Someone already filled in the information for a table comparing bacterial cells vs. eukaryotic cells regarding their surface- to-volume ratios (S/V). Assuming that both types of cells are spherical, the bacterium has a diameter of 1 μm, the animal cell has a diameter of 15 μm. The last column includes the internal membranes of the cell in the calculation of surface area, assuming internal membranes with 15 times the area of the plasma membrane. The volume of a sphere is given by V = 4pr3/3 and its surface by S = 4pr2, where r is its radius.

Calculate the value for the grayed table cell. Pay attention to all details on the table’s heading.

A) 640

B) 64.0

C) 6.4

D) 0.64

E) My result is different:

26. Briefly describe what is an ultracentrifuge. Compare and contrast an ultracentrifuge with a clinical centrifuge in terms of capabilities and applications.

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