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PD BIO 120 > Exam 1 > Flashcards

Exam 1 Flashcards

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Biology 101 flashcards
1
Q

What is the correct order of the scientific method?

A

Observation, question, hypothesis, experiment, data analysis, conclusion.

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2
Q

THe independent variable?

A

Is changed by the experimenter

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3
Q

They Null hypothesis of an experiment is?

A

an alternative possibility in the event that the explanation being tested does not apply

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4
Q

What is mean?

A

Average

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5
Q

What is median

A

Middle value

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6
Q

What is the mode?

A

Most used value

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7
Q

Which is NOT a category of proteins?

Defensive, Structural, Cell transportation, Offensive, Intracellular movement, Cell signaling

A

OFFENSIVE

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8
Q

Know a good example of normalized data?

A

Normalized data?

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9
Q

What is the dependent variable?

A

Measured by the experimenter, usually the Y Axis

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10
Q

What is a negative control?

A

Placebo, insures that results are not due to the testing nature of experiment.

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11
Q

Who is the person who taught the library literacy class?

A

Michael Goates

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12
Q

Polypeptides are ordered?

A

From the N-terminus to the C-terminus.

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13
Q

Which of the following observations is the strongest arguement in favor of the hypothesis that protein structure and function are correlated?
1- Enzyme3s tend to be globular in shape
2-Incorrectly folded proteins do not function properly.
3-Proteins function best at certain temperatures.
4-Proteins have four distinct levels of structure and many functions.

A

2- Incorrectly folded proteins do not function properly.

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14
Q

What are the categories of R-groups in a protein?

A

Hydrophobic, Hydrophilic, Acidic

*not Simple

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15
Q

In a protein, what is most responsible for the secondary structure called an alpha-helix?

A

Hydrogen bonds that form between carbonyl and amino groups on different residues

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16
Q

When counting a string of amino acids where do you start?

A

Start with Amino group, this counts as first one

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17
Q

Which nitrogenous base is used only in RNA?

A

Uracil

18
Q

Which of the following best describes tertiary structure?

A

Covalent bonding between two Sulfur atoms in R-group side chains of amino acids

19
Q

Which of the following best describes secondary structure?

A

Hydrogen bonding between portions of the backbone of the polypeptide

20
Q

Know the images of pentose sugar

A

it is a ribonucleotide

21
Q

DNA is written:

A

5’ to 3’

22
Q

The cell theory put to rest which popular theory in the eighteenth and nineteenth centurey?

A

Theory of spontaneous generation

23
Q

Glycoproteins are important signal proteins. where are these types of proteins usually found on the cell?

A

On the exterior of the cell

24
Q

Erwin Chargaff researched and established?

A

The ratio of purines to pyrimidines in the molecule

25
Q

The amino acid Valine is gernerally found in the interior of globular proteins and in Membrane proteins. What characteristic of this amino acid can we infer from this information?

A

The amino acid is hydrophobic

26
Q

According to Dr. Geary, the state that grows the best potatoes

A

Idaho

27
Q

Which of the following contributes to osmotic pressure?

A

Solution concentration

28
Q

Which of the following is an attribute of an unsaturated lipid bilayer?

A

Double bond between fatty acid carbons

29
Q

Osmotic pressure

A

The water moves to the side with them most molucules to even out the solution

30
Q

Tinea Pedis is a fungus that causes athletes foot, what carbohydrate does it use in its cell walls?

A

Chitin

31
Q

The organelle responsible for ribosome production is the

A

Nucleolus

32
Q

Which of the following does not contain DNA?

A

SER–

Nucleus, Mitochondria, Chloroplast, Photosynthetic cyanobacteria, all have DNA

33
Q

____ are most commonly found in the ________ becuase their job is to break down toxins in the cells.

A

Peroxisomes, Liver

34
Q

In the event that an organelle dies due to old age, which organelle has the duty of recycling the deceased organelle?

A

Lysosome

35
Q

The small intestine is the site of digestion and absorption of nutrients. A single layer of epithelial cells lines the small intestine. In the duodenum, these epithelial cells secrete large quantities of digestive enzymes. Which features would be typical of these epithelial cells?

A

Contain large quantities of rough endoplasmic reticulum

36
Q

Lipids that form membranes have what kind of structure?

A

Polar heads and nonpolar tails: the polar heads interact with water

37
Q

Which of the following statements best describe the fluid-mosaic model of the membrane structure?

A

The phospholipid bilayer contains diverse proteins, including some embedded amphipathic proteins that span the bilayer

38
Q

It was discovered that a certain cell type in the human body contains many ribosomes, more than any other human cell type contains. Which is a reasonable assumption?

A

The cell secretes lots of proteins.

39
Q

A certain Eukaryotic cell type specializes in synthesizing lipids. Which organelle do you think would be found in greater abundance in this cell type compared to other cell types that dont synthesize lipids?

A

Smooth ER

40
Q

Which of the following correctly orders the above molecules from least to most permeable through a lipid bilayer?

A

K+ (an Ion), Sucrose (an uncharged polar molecule), H2O (an uncharged polar molecule), CO2 (a nonpolar molecule)

41
Q

Be able to design your own expericment, What is required for a good experiment?

A

do it

42
Q

FINISH ESSAY PART OF TEST!

A

do it

PD BIO 120 (2 decks)

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