Exam 1- Chemistry

Question 1

DNA

Answer 1

Deoxy-ribose nuclei acid
Cytosine binds to guanine
Adenine binds to thymine

Question 2

Cellular respiration equation

Answer 2

glucose + oxygen + energy carrier -> carbon dioxide + water + energy carrier

Question 3

ATP

Answer 3

Adenosine- triphosphate

Energy released from breaking of covalent bonds in glucose during respiration is captured, stored and transported by ATP

Question 4

Acids

Answer 4

Donate or give away hydrogen ions

Question 5

Bases

Answer 5

Accept or receive hydrogen ions

Question 6

Buffers

Answer 6

Resist changes in cells pH by releasing or accepting free hydrogen ions

Question 7

Low pH

Answer 7

Acid( eg lemon juice and stomach acid= 2)

Question 8

Neutral pH=

Answer 8

7 (eg distilled water, blood)

Question 9

High pH

Answer 9

Basic (eg oven cleaner 13.5)

Question 10

pH

Answer 10

Is the scale that the amount of H+ is measured by (0-14)

Question 11

Proteins

Answer 11

Large molecules composed of one or more chains of amino acids in a specific order determined by the base sequence of nucleotides in the DNA coding for protein. They are required for the structure, function and regulation of the body’s cells, tissues, and organs.

Question 12

Phospholipids

Answer 12

Are vital as they form the barrier between the cell and external environment. Materials that dissolve in lipid can pass through readily

Question 13

RNA

Answer 13

Single strand