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Your research is based around the size and shape of the nucleus,and for this you need to differentiate the nucleus from other structures in the cell.The parameter of the microscope you would mainly need to change would be the


A) confocal.
B) contrast.
C) resolution.
D) phase.
E) magnification.

F) C) and E)
G) A) and E)

Correct Answer

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You have just joined a lab where your job is to observe cells through a microscope.Match up the description with the main parameters you will need to know.

Premises
Increased size from actual size
The ability to distinguish between two points or clarity of an image
Type of microscopy; not a parameter
A dye is used to more readily compare cellular structures
Type of microscopy; not a parameter
Responses
Contrast
Magnification
Confocal
Phase
Resolution

Correct Answer

Increased size from actual size
The ability to distinguish between two points or clarity of an image
Type of microscopy; not a parameter
A dye is used to more readily compare cellular structures
Type of microscopy; not a parameter

The protective layer outside of the plasma membrane of the plant cell is called


A) cellulose.
B) proteoglycans.
C) the cell wall.
D) chitin.
E) pectin.

F) A) and B)
G) B) and E)

Correct Answer

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The function of a cell is determined the amount of surface area it has.Is this statement true or false and why?


A) False.Fewer cells with equal mass will have greater surface area and therefore greater transport efficiency.
B) True.A cell with the same mass can increase surface area with structures like microvilli that enhance absorption functions.
C) False.Cells of equal mass cannot change their surface area;therefore cell mass determines cell function.
D) True.Greater cell mass always increases cell surface area leading to greater efficiency of transport.

E) All of the above
F) None of the above

Correct Answer

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Cell walls contain ____.


A) chitin
B) cellulose
C) proteoglycans
D) collagen
E) laminins

F) B) and C)
G) All of the above

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If you wanted to separate cells from a plant tissue into individual cells you would need to disrupt _____.


A) middle lamella
B) hemidesmosomes
C) plasmodesmata
D) adherens junctions
E) primary cell walls

F) B) and D)
G) A) and B)

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If you tear your Achilles tendon you are damaging ECM-rich ________ tissue.


A) epithelial
B) hepatic
C) nervous
D) muscle
E) connective

F) All of the above
G) A) and B)

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Cells can sense changes in the environment through alterations in the extracellular matrix.

A) True
B) False

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Patients with Ehlers-Danlos syndrome have a defect in their ability to synthesize collagen.Predict the symptoms would you expect them to have?


A) Thicker extra cellular matrix.
B) Thinner cell walls.
C) Tight,inflexible skin.
D) Stronger than usual bones.
E) Hyper-flexible joints.

F) A) and B)
G) A) and E)

Correct Answer

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