Which of the following will increase in concentration in muscle cells during strenuous muscular activity?
a) lactic acid
b) carbon monoxide
c) glucose
a) lactic acid
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thief
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rocket
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rocket
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banana
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15
How many atoms are in a mole?
a) 6.022 x 10^23
b) 6.022 x 10^24
c) 6.022 x 10^25
a) 6.022 x 10^23
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15
Which of these is the main way that ocean tides are created?
a) The rotation of the Earth on its axis
b) The gravitational pull of the moon
c) The gravitational pull of the sun
b) The gravitational pull of the moon
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15
The green pigment in plants that is capable of absorbing the sun's energy is
a) Porphyrin
b) Beta carotene
c) Chlorophyll
c) Chlorophyll
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baam
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gift
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shark
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baam
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15
Which is considered to be the computers short-term memory?
a) REM
b) ROM
c) RAM
c) RAM
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15
What connects bones to other bones?
Select one:
a) cartilage
b) tendons
c) ligaments
c) ligaments
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15
The hardest substance available on earth is
a) Diamond
b) Platinum
c) Rocks
a) Diamond
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15
What kind of animal is the platypus (Ornithorhynchus anatinus)?
a) Mammal
b) Reptile
c) Amphibian
a) Mammal
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gift
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thief
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15
What does a light-year measure?
a) Brightness
b) Time
c) Distance
c) Distance
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trap
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star
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fairy
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lifesaver
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15
Organic chemistry is the study of compounds that contain what element?
a) Nitrogen
b) Potassium
c) Carbon
c) Carbon
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15
Which of these isn't an essential aminoacid?
a) Lysine
b) Thryptophan
c) Riboflavin
c) Riboflavin
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15
What is the scientific term for peeling skin?
a) Desquamation
b) Dermatitis
c) Exfoliation