l Sprint LTE 10:10 PM Chapter 1 Homework e Chapter 1 Homework Chapter 1, Questio

Question

l Sprint LTE 10:10 PM Chapter 1 Homework e Chapter 1 Homework Chapter 1, Question To appreciate the sizes of the subcellular structures shown in the figure below, consider the calculations on the left. Part A All cells and many subcellular structures are surrounded by a membrane. Assuming a typical membrane to be about 8 nm wide, how many such membranes would have to be aligned side by side before the structure could be seen with the light microscope? Express your answer as an integer Request Answer Part B How many with the electron microscope? Express your answer as an integer Part C Ribosomes are the cell structures in which the process of protein synthesis takes place. A human ribosome is a roughly spherical structure with a diameter of about 30 mm. How

Explanation / Answer

Part A

Resolution of light microscope= 0.9 m= 900 nm

Size of typical membrane= 8 nm

So, no. of structures that could be seen are 900 nm/8 nm=112.5

Part B

Resolution of electron microscope= 0.2 m= 200 nm

Size of typical membrane= 8 nm

So, no. of structures that could be seen are 200 nm/8 nm=25

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