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Biology Exam 1 > Scientific Method & Chemistry Assignment > Flashcards

Scientific Method & Chemistry Assignment Flashcards

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1
Q

According to the scientific method, what is a possible answer to a question?

A

hypothesis

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2
Q

What is the correct order for the scientific method?

A

observation, question, hypothesis, experiment, results, conclusion

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3
Q

a scientific theory at one point in time was a hypothesis.

T/F

A

True

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4
Q

What is correct for a control group?

a. it receives the smallest amount of the drug
b. it does not receive the drug
c. it is the group that is manipulated
d. all of the above

A

b. it does not receive the drug

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5
Q

[a] in data between the control and experimental group along with [b] are the two factors that stastical significance depends on.

A

a. Magnitude of the difference

b. sample size

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6
Q

What is the most trustworth source of scientific information?

A

primary source

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7
Q

Put in chronological order the headings that are found in a primary source article.

A
  1. abstract
  2. background
  3. methods
  4. results
  5. discussion
  6. conclusion
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8
Q

What is good science?

a. has a hypothesis
b. only one variable is manipulated
c. large sample sizes
d. is tested more than once
e. has alternate hypotheses
f. uses primary source articles to guide research
g. all of the above

A

g. all of the above

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9
Q

What makes a good clinical trial?

a. has placebo
b. is randomized
c. large sample size
d. published in a reputable journal
e. all of the above

A

e. all of the above

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10
Q

what is a pure substance called?

a. cell
b. molecule
c. atom
d. element

A

d. element

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11
Q

What are the 4 elements that make up the bulk of living organisms?

A

carbon, hydrogen, oxygen, and nitrogen

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12
Q

What element is needed to make thyroid hormone and what food has that element added to it?

A

iodine; salt

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13
Q

What is correct about neutrons of an atom?

a. have a positive charge
b. have a negative charge
c. are located orbiting the nucleus
d. have an atomic mass of 1

A

d. have an atomic mass of 1

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14
Q

What determines atomic number?

a. number of neutrons
b. number of protons
c. number of electrons
d. number of protons and neutrons

A

b. number of protons

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15
Q

A nitrogen atom has an atomic number of 7, so its atomic mass is ____?

a. 3
b. 7
c. 14
d. 21

A

c. 14

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16
Q

How many electrons can the first shell of an atom hold?

A

2

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17
Q

Variant forms of an element are ___________where the number of __________vary.

a. ions; neutrons
b. ions; electrons
c. isotopes; neutrons
d. isotopes; electrons

A

c. isotopes; neutrons

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18
Q

A charged atom is an isotope?

T/F

A

False

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19
Q

When an atom donates an electron and another accepts it, a(n) _________bond is formed?

a. ionic
b. nonpolar covalent
c. polar covalent
d. hydrogen

A

a. ionic

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20
Q

An equal sharing of electrons between two atoms is a(n) ___ bond.

a. ionic
b. non polar covalent
c. polar covalent
d. hydrogen

A

b. non polar covalent

21
Q

What is the percentage of the human body the is made up of water?

A

60%

22
Q

Water is a ___ because it dissolves other substances.

A

solvent

23
Q

Concentration of what ion determines the pH of a solution?

a. carbon ion
b. chloride ion
c. hydrogen ion
d. potassium ion

A

c. hydrogen ion

24
Q

A solution with a ph of 4 has a _________concentration of hydrogen ions and is a(n)__________solution.

a. high; basic
b. low; basic
c. high; acidic
d. low; acidic

A

c. high; acidic

25
Q

A biological molecule is organic, meaning it contains what element?

a. hydrogen
b. nitrogen
c. oxygen
d. carbon

A

d. carbon

26
Q

What is NOT a major type of macromolecule?

a. protein
b. nucleic acid
c. sugar
d. carbohydrate

A

c. sugar

27
Q 
Match the monomer with its macromolecule.
-Sugar
-amino acid
-nucleotide
-fatty acid chain
A. Protein
B. Lipid
C. Carbohydrate
D. DNA
A

sugar–C: carbohydrate
amino acid–A: protein
nucleotide–D: DNA
fatty acid chain–B: Lipid

28
Q

Match the combination of simple sugars with the appropriate disaccharide.
Glucose & Glucose

A

Glucose & Glucose: Maltose (grain sugar)

29
Q

Match the polysaccharide with its function:

glycogen

A

energy storage in animals

30
Q

Match the polysaccharide with its function:

starch

A

energy storage in plants

31
Q

Match the polysaccharide with its function:

cellulose

A

gives rigidity to plants

32
Q

Match the polysaccharide with its function:

chitin

A

gives rigidity to insect bodies

33
Q

Match the combination of simple sugars with the appropriate disaccharide.
Glucose & Galactose

A

Glucose & Galactose: Lactose (milk sugar)

34
Q

Match the combination of simple sugars with the appropriate disaccharide.
Glucose & Fructose

A

Glucose & Fructose: Sucrose (table sugar)

35
Q

What is a function of proteins?

a. can carry substances around the body
b. can protect from diseases
c. speed up reactions
d. act as membrane receptors
e. all are functions of proteins

A

e. all are functions of proteins

36
Q

What are 2 type of nucleic acids?

A

DNA; RNA

37
Q 
Match the lipid with the appropriate example or description of that lipid:
-phospholipids
-triglycerides
-waxes
-steroids
A. cholesterol
B. semisolid lipids
C. cell membrane fats
D. storage fats
A

phospholipids: C. Cell membrane fats
triglycerides: D. Storage fats
waxes: B. Semisolid lipids
steroids: A. Cholesterol

38
Q

What type of lipid is usually unhealthy and is a solid at room temperature?

A

saturated fats

39
Q

High Density Lipoproteins (HDLs) are bad cholesterol.

T/F

A

False

40
Q

How is a hypothesis tested?

a. doing research and investigating peer review articles
b. conducting an experiment or gathering observational data
c. developing a theory of how the world works
d. looking at statistical facts and providing evidence
e. none of the above

A

b. conducting an experiment or gathering observational data

41
Q

What part of a primary source article contains information on how an experiment was designed?

a. background
b. results
c. methods
d. conclusion
e. discussion

A

c. methods

42
Q

What are two factors from your powerpoint slides that statistical significance depends on?

A

magnitude of the difference and sample size

43
Q

Molybdenum has an atomic number of 42. Which of the following is true of a neutral molybdenum atom?

a. It has 42 protons, 21 neutrons and 42 electrons
b. It has 42 protons, 42 electrons and no neutrons
c. It has 42 protons, 42 neutrons and 42 electrons
d. It has 21 protons, 21 neutrons and 21 electrons
e. It has 21 protons, 21 electrons and no neutrons

A

c. It has 42 protons, 42 neutrons, and 42 electrons

44
Q

What element below is not one of the four elements that make up the bulk of living organisms?

a. nickel
b. carbon
c. oxygen
d. nitrogen
e. hydrogen

A

a. nickel

45
Q

_____is a charged atom.

a. a molecule
b. an ion
c. an isotope
d. water
e. none of the above

A

b. an ion

46
Q

What is INCORRECT about water?

a. 60% of the human body is water
b. it is a solvent
c. ice floats in liquid water
d. hydrogen bonds between water molecules creates surface tension
e. it is an organic molecule

A

e. it is an organic molecule

47
Q

What is the monomer for proteins?

a. monosaccharides
b. enzymes
c. nucleic acids
d. amino acids
e. triglycerides

A

d. amino acids

48
Q

What two monosaccharides are bonded together to make lactose?

a. glucose and fructose
b. glucose and glucose
c. fructose and fructose
d. glucose and galactose
e. galactose and galactose

A

d. glucose and galactose

49
Q

Cholesterol is what ‘type’ of lipid?

a. steroid
b. saturated fat
c. unsaturated fat
d. wax
e. triglyceride

A

a. steroid

Biology Exam 1 (4 decks)

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