Exam 2 Flashcards

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1
Q

Which of the following is true for cells?
A)all organisms are composed of cells
B) cells are the smallest living things
C) Cells arise only from pre-existing cells
D) all the above

A

D) all the above

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2
Q

Warm temperatures tend to ______ the rates of diffusion

A

Increase

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3
Q

As cell size increases, its volume increases much more rapidly than its surface area.

True or False?

A

True

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4
Q

DNA is located in a cells nucleus.

T or F

A

True

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5
Q

Archaea and bacteria are prokaryotic domains.

T or F

A

True

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6
Q

The lack of a membrane bound nucleus is a characteristic of?

A

Prokaryotes

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7
Q

Only eukaryotic cells have ribosomes.

T or F

A

FALSE

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8
Q

Which of the following have cells without walls?
A)Bacteria
B)Fungi
C)Plants
D)animals

A

D) animals

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9
Q

Membrane bound organelles are found in?

A

Eukaryotes

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10
Q

Plasma membranes are found only in Eukaryotic cells.

T or F

A

FALSE

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11
Q

Chloroplasts and Specialized vacuoles are found in?

A

Plant cells and some protists

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12
Q

The nucleolus is responsible for ribosome synthesis.

T or F

A

TRUE

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13
Q

Rough ER has ribosomes attached to it.

T or F

A

TRUE

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14
Q

Packaging and distribution of molecules is the function of the Golgi apparatus.

T or F

A

TRUE

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15
Q

Digestive vesicles containing enzymes are the ____

A

Lysosomes

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16
Q

Vacuoles are membrane bound structures found in _____

A

Plants

17
Q

Which organelle is responsible for ATP synthesis?

A

Mitochondria

18
Q

Mitochondria and chloroplasts have their own DNA.

T or F

A

TRUE

19
Q

Microfilaments, microtubules and intermediate fibers are components of the _____

A

Cytoskeleton

20
Q

Cilia are typically shorter and more numerous than flagella.

T or F

A

TRUE

21
Q

Chitin is found in….

A

Fungi and arthropod cell walls

22
Q

Adhesive junctions, tight junctions, and communicating junctions are types of ____

A

Cell connections

23
Q

For membranes, the phospholipid bilayer is arranged with hydrophobic portions to the inner side and hydrophilic portions to the outside.

T or F

A

TRUE

24
Q

Which of the following is NOT true for cell membranes?
A) Provides a selectively permeable barrier
B) Contains proteins that span its width
C) Only has proteins at the outer surface

A

C) only has proteins at the outer surface

25
Q

Lipids in the cell membrane provide it with fluidity.

T or F

A

TRUE

26
Q

The tail part of phospholipids are hydrophilic.

T or F

A

FALSE

27
Q

Hydrogen bonds hold the phospholipid bilayer together.

T or F

A

TRUE

28
Q

Saturated fatty acids make the membrane more fluid than unsaturated fatty acids.

T or F

A

FALSE

29
Q

Which of the following is true for membrane proteins?
-attach to cytoskeleton
-act as cell surface receptors
-enzymes
-transporters
-all the above

A

E) all the above

30
Q

Warm temps make the membrane more fluid than cold temps.

T or F

A

TRUE

31
Q

Polar regions of trans membrane proteins protrude from both sides of the phospholipid bilayer.

T or F

A

TRUE

32
Q

Which of the following is NOT true for passive transport?
A) No energy required
B) Molecules move in response to a concentration gradient
C) its continuous

A

C) it’s continuous

33
Q

During diffusion, molecules move from an area oh high concentration to low concentration.

T or F

A

TRUE