LIFE 120 1-3 Review

Which of the following functional groups is capable of regulating gene expression?

-CH3 (Methyl)

Household ammonia has a pH of 12; household bleach has a pH of 13. Which of the following statements about these substances is true?

The ammonia has 10 times as many H+ ions as the bleach.

Which of the following contains a carboxyl and an amino group?

amino acid

Which of the following is not made from long chains of glucose?

monosaccharides

Which of the following statements regarding nucleotides is false?

nucleotides contain lipids

The hydrogen atoms of a water molecule are bonded to the oxygen atom by ________ bonds, whereas neighboring water molecules are held together by ________ bonds.

polar covalent; hydrogen

Select the most complete explanation of what the pH scale measures.

the concentration of hydrogen ions in a solution

Identify the part of the atom that most determines the chemical properties of the atom.

the number of electrons

A controlled experiment is one in which

there are at least two groups, one of which does not receive the experimental treatment.

Use the following study to answer the following question(s): A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produces the largest tomato yield.

yield