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BIO LAB > Questions > Flashcards

Questions Flashcards

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Biology 101 flashcards
1
Q

You NEVER use which of the following once you switch to the high power or oil immersion objectives?

A

coarse adjust knob

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2
Q

Egg yolks have a pH of 5.6; milk has a pH of 6.6; orange juice has a pH of 3.6; and water has a pH of 7. What is the difference in hydrogen ion concentration between milk and orange juice?

A

1000 times

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3
Q

What is the core purpose of scientific investigations?

A

understanding the world around us

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4
Q

what is the name of the covalent bond that forms between glycerol and fatty acids in phospholipids and triglycerides?

A

ester bonds

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5
Q

Simple Diffusion

A

a substance that is soluble in the lipid bilayer and moves across the membrane from a point of high concentration to low concentration

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6
Q

What enzyme is important for fat digestion?

A

lipase

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7
Q

A cellular diameter of 40 micrometers is equivalent to

A

0.04 mm

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8
Q

Which form of lipids is used to store excess energy that is consumed by mammals?

A

triglycerides

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9
Q

Which of the following membrane constituents is most likely to determine the selectivity of the cell membrane?

A

proteins

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10
Q

When using a microscope the ability to see two items as separate and discrete entities is?

A

resolution

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11
Q

Which section of you lab report serves as a brief summary of the entire experiment?

A

abstract

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12
Q

What is not essential in the process of research (testing an idea)?

A

testing an entire population

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13
Q

Which functional group is most responsible for some organic molecules having bases?

A

amino groups

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14
Q

What is the function of carbohydrates in the cell membrane?

A

cell to cell recognition

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15
Q

Simple diffusion differs from facilitative diffusion because

A

simple diffusion is not saturable and

facilited diffusion are limited by the number of functional membrane proteins and can be saturated

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16
Q

What is the standard magnification of the ocular lens?

A

10

17
Q

A t test is used

A

to compare two sample means

18
Q

A substance with a low pH is

A

an acid

19
Q

A substance with a high pH is

A

a base

20
Q

what is the most inorganic molecule in the body>?

A

water

21
Q

what is common monosaccharide?

A

fructose

22
Q

When comparing two solution, the one with the greater number of solute molecule is ___ to the solution with fewer solute molecules?

A

hypertonic

23
Q

what enzyme is involved in the digestion of starch?

A

amylase

24
Q

The aperture of which objective lens is largest

A

scanning lens

25
Q

When viewing a specimen under the microscope you place the slide on the

A

stage

26
Q

Standard deviation

A

measure of experiment variation (individual variation from one subject to another)

27
Q

What are the respective sizes of virus and platn cell?

A

30 naometers 30 micrometers

28
Q

Hypothesis

A

tentative explanation for some phenomenon that can be tested experimentally

29
Q

What is the standard pore size of the dialysis tubing?

A

10,000 daltons

30
Q

term that means that if an object is focused with the low power objective, it is focused when you switch to the high power objective?

A

parfocal

31
Q

What is the light source used with a compound light microscope

A

visible light

32
Q

The difference in concentraiton of a solute across a membrane is called

A

concentration gradient

33
Q

Cells must produce many different enzymes because

A

most cellular reactions require a specific unique enzyme

34
Q

What is the role of smooth ER in skeletal muscle?

A

calcium storage

35
Q

where can amoeba be found?

A

aqueous environments

36
Q

What feature makes phospholipids amphipathic?

A

one end is hydrophilic and one end is hydrophobic

37
Q

Describe the cell membrane

A

molecules form a double later with the polar regions facing the cell interior and the outside of the cell, and hydrophobic regions forming the interior of the cell membrane

38
Q

Which enzyme is involved in the digestion of starch?

A

amylase

BIO LAB (7 decks)

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