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Biology 30S > Test 1 Chapters 1 & 2 > Flashcards

Test 1 Chapters 1 & 2 Flashcards

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0
Q

Which of the following best describes the scientific method?
A. Observation, hypothesis, experiment, absolute proof
B. guess, hypothesis, experiment, conclusion
C. Hypothesis, experiment, conclusion, observation
D. Observation, hypothesis, experiment, conclusion
E. Experiment, observation, hypothesis, conclusion

A

D. Observation, hypothesis, experiment, conclusion

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1
Q 
Homeostasis is a \_\_\_\_\_\_\_\_ form of equilibrium.
A. static
B. stable
C. dynamic
D. fixed
A

C. dynamic

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2
Q

a thermostat provides one example of homeostasis. Temp is set at a “set point” and fluctuates slightly around it. When the temp reaches a temp below the set point the furnace will turn on, and when it gets above the set point it will turn off. This is a system of ______ feedback.
a. systemic b.neutral c.negative d.positive

A

c. negative

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3
Q

Which is the missing component in the following ascending hierarchy of organization: organelles -> cells -> _______-> organs?

a. prokaryotes b. organ system
c. DNA d. tissue

A

d. tissue

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4
Q

Which is the best phrase to sum up the theme of “Emergent Properties”?

a. “When it comes to life, the bigger the better.”
b. “All that lives must die.”
c. “The whole is greater than the sum of its parts.”
d. “The only things constant in life is change.”

A

c. “The whole is greater than the sum of its parts.”

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5
Q

According to the video “The Incredible Human Machine”, approximately how many separate muscles does the typical human body have?

a. 206 b.512
c. 650 d.725

A

c. 650

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6
Q

which of the following is the best example of an organ system?

a. your heart and brain
b. your stomach and spleen
c. your heart, arteries and veins
d. your kidneys and lungs

A

c. your heart, arteries and veins

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7
Q

biological instructions for an organism’s structure and function are encoded in it _____.

a. RNA b. nucleolus
c. genes d. ribosomes

A

c. genes

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8
Q

a(n) ______ is a substance with specific properties which cannot be broken down further by simple physical or chemical means.

a. mole b. element
c. compound d. molecule

A

b. element

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9
Q

according to you notes, ________ is the major unifying theme of all biology which all other themes relate to.

a. Genetic b. Evolution
c. Reproduction D. Homeostasis

A

b. Evolution

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10
Q

the atomic number of an element is based on its number of

a. neutrons
b. protons.
c. electrons
d. isotopes

A

b. protons

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11
Q

most of the mass of an atom is found in it

a. neutrons
b. electrons
c. protons
d. nucleus e. orbitals

A

d. nucleus

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12
Q

organic molecules contain 2 or more

a. nitrogen atoms
b. carbon atoms
c. sugar molecules.
d. oxygen molecules e. DNA molecules

A

b. carbon atoms

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13
Q

a covalent bond forms

a. when two ions are attracted to one another
b. between adjacent water molecules
c. when two atoms share valence shell electrons
d. when one atom gives up its electrons to another atom

A

c. when two atoms share valence shell electrons

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14
Q

models of the atom have been refined so that electrons are now described as

a. floating around the nucleus in relatively fixed positions
b. located in orbitals that vary in energy and location about the nucleus
c. moving in spherical orbits around the nucleus like a solar system
d. very small and unimportant particles compared to protons

A

b. located in orbitals that vary in energy and location about the nucleus

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15
Q

the chemistry of elements is largely determined by

a. the size of the nucleus
b. the number of the protons in the nucleus
c. the number of the neutrons in the nucleus
d. the number of electrons in the outer shell

A

d. the number of electrons in the outer shell

16
Q

complex biological molecules are usually ______ that are synthesized from modular precursors called ______

a. Proteins, amino acids
b. Polymers, monomers
c. Monomers, polymers
d. Rings, chains

A

b. Polymers, monomers

17
Q

all amino acids contain a single H, an amine group (NH3), a COOH group and a(n) ____ group which varies

a. X c. R
b. Z d. S

A

c. R

18
Q

what is the defining characteristic of a base?

a. it accepts (has a low concentration of) hydrogen ions
b. it donates (has a high concentration of) hydroxide ions
c. it donates (has a high concentration of) hydrogen ions
d. it has a pH greater than 7

A

A and B, tiny bit of C

19
Q 
if i have one mole of sodium atoms, how many individual sodium atoms do i have?
a. 6.022 x 10 x23
b 6.022 x 10^23
c. 6.022 x 1023
d. it is impossible to know
A

b. 6.022 x 10^23

20
Q

a substance that contains two or more kinds of atoms in a fixed ratio is called a(n)

a. isotope b. element
c. compound d. mixture

A

c. compound

21
Q

the H and O of a water molecule are joined together by:

a. hydrogen bonds
b. ionic bonds
c. covalent bonds

A

c. covalent bonds

22
Q

the polymer cellulose, starch, and glycogen are all made from glucose, but they have different properties. For example, humans can digest starch and glycogen, but not cellulose. How is this possible?

a. the 3 polymers have different functional groups
b. the glucose molecules are joined in slightly different ways
c. the 3 polymers have different molecular compositions
d. the 3 polymers are synthesized by different cells

A

b. the glucose molecules are joined in slightly different ways

23
Q

the major molecule that directly provides the energy for most biological processes is ATP. Using your knowledge of chemistry and by process of elimination, you can figure out that ATP can be described as a

a. nucleic acid b. carbohydrate
c. component of DNA d. modified sugar
e. nucleotide

A

d. modified sugar

24
Q

DNA and RNA both

a. contain ribosomes d. are proteins
b. are double helices e. are carbohydrates
c. contain a sugar f. are lipids

A

c. contain a sugar

25
Q

I am doing laundry and trying to get tomato and greasy cheese stains off my lab coat. What type of detergent will work best?

a. one with polar constituent chemicals
b. one with non-polar constituent chemicals
c. one with both polar and non-polar aspects
d. I should just lick my lab coat clean to get the stains out

A

c. one with both polar and non-polar aspects

26
Q

logically, all amino acids must contain

a. phosphorus
b. sulfur
c. nitrogen
d. helium

A

c. nitrogen

Biology 30S (9 decks)

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