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A. E = mc2
B. E = cm2
C. M = ec2
D. M = ce2

A. Blood glucose level
B. The body pH value
C. Amount of hemoglobin
D. Salinity in Urine
A biosensor is a sensor exploiting a biomolecule and is used to measure the presence of a certain substance in a liquid. For example, the medical world uses biosensors to detect a virus in the blood or to measure glucose levels in blood. These are mainly point-of-care applications, where direct results are important.

A. 10 – 20
B. 20 – 30
C. 30 – 40
D. 40 – 50

The planets visible to us without using a telescope are __________?

A. 3
B. 4
C. 5
D. 6

There are 5 planets visible without a telescope, Mercury, Venus, Mars, Jupiter and Saturn. The largest planet in our solar system by far is Jupiter.

A. Mars
B. Saturn
C. Uranus
D. Jupiter

A. 9.5×106 km
B. 9.5×109 km
C. 9.5×1012 km
D. 9.5×1018 km

A. Saturn
B. Venus
C. Mars
D. Jupiter

A. Mercury
B. Venus
C. Mars
D. Jupiter

A. 1 gram
B. 10 grams
C. 1 kg
D. 10 kg