M1 Lesson 2 - Properties of Water and Chemical Reactions in the Cell

Question 1

what is the most abundant molecule in cells, accounting for 70% or more of total cell mass

Answer 1

water

Question 2

Water is a (polar/non-polar) molecule with the hydrogen atoms having a slight (positive/negative) charge and the oxygen with a slight (positive/negative) charge?

Answer 2

polar
positive
negative

Question 3

This polarity enables water molecules to form (what type of bond) with each other

Answer 3

hydrogen bond

Question 4

polar molecules are soluble or insoluble in water?

Answer 4

soluble

Question 5

non-polar molecules are soluble or insoluble in water?

Answer 5

insoluble

Question 6

It acts as a solvent for many chemical reactions and also helps transport dissolved compounds into and out of cells. It is a metabolite in many chemical reactions like photosynthesis, digestion, and aerobic respiration.

Answer 6

water

Question 7

Regulation of water balance depends upon hypothalamic mechanisms that control thirst to ________________, on retention or excretion of water by the kidneys, and on evaporative loss.

Answer 7

antidiuretic hormone (ADH)

Question 8

Nephrogenic diabetes insipidus, which involves the inability to concentrate urine or adjust to subtle changes in extracellular fluid osmolarity, results from the unresponsiveness of __________ to ADH

Answer 8

renal tubular osmoreceptors