Reminders

Biosphere Observations– Note: there will be NO

tutorial on Friday!

Question of the Day

Question: What is buffering capacity and why does it matter to living things?

Answer: … … …

1’s Turn In:- p. 44 A.Q.’s 3abc- Inv. 4.1: pH Lab (stapled)- Inv. 4.3: Liver Lab (stapled)

Notes: Nucleic Acids

• Nucleic Acid- macromolecule containing H, O, N, C, P; carries hereditary material

• Basic unit is nucleotide, which has 3 parts:– phosphate group– 5-carbon sugar

Basic Info

– nitrogenous base• Adenine, Thymine,

Guanine, Cytosine, OR Uracil

Nucleotide:

Nucleotides link together to form

nucleic acids (DNA, RNA).

• DNA– has deoxyribose sugar– deoxyribonucleic acid– genetic material inherited from parents– bases: A, T, G, C

Examples of Nucleic Acids

• RNA– has ribose sugar– ribonucleic acid– genetic material used in making

proteins– bases: A, U, G, C

Examples of Nucleic Acids

Computer Lab

3a. What is an acid? What is a base?3a. An acid is a compound that forms hydrogen (H+) ions in solution. A base forms hydroxide ions (OH-) in solution.

3b. The acid hydrogen fluoride (HF) can be dissolved in pure water. Will the pH of the solution be greater or less than 7?3b. If an acid is dissolved in pure water, then the pH of the solution will be less than 7.

3c. During exercise, many chemical changes occur in the body, including a drop in blood pH, which can be very serious. How is the body able to cope with such changes?3c. A drop in blood pH is countered by chemical buffers such as bicarbonate and phosphate ions.

p. 44 A.Q. 3abc

Jake has worked really hard and has improved tremendously in his classes. As a result of his transformation into a leader, he helps others on homework assignments and classwork. Furthermore, he is respectful, has a positive attitude, and is involved in his community.

"Jake is always honest and approaches everything with positivity."

Freshman Student of the Month: Jake Tonges