Feb 2nd Review section

Genome=total set of DNA an organism has (in one cell)
*coding DNA=instructions for proteins
*noncoding DNA=doesn't provide instructions for proteins ( >80% of human DNA)

Hydrolyzing=breaking down or adding a hydrogen to something

there is a relationship between the nucleotide sequence in a gene and amino acid sequence in a protein.

  • gene= swatch of DNA that codes for a particular protein

cells don't divide all the time because RB (retinoblastoma) stops them. If the RB is is hydrolyzed, then the cell continues on into S phase.

What does hydrolyzed have to do with phosphorylated?

You are going to need to know the proteins we have talked about aka RB, Cdk, cyclin…

There will be no Hardy-Weinberg questions involving math. But the underlying point that gene frequency should stay pretty much the same UNLESS there is selective pressure aka evolution should be understood.

Gene expression —> From DNA nucleotide to RNA nucleotide to order of amino acids=proteins

Similarity/Difference multi. answer question
Which of the following are differences between meiosis and mitosis?
a. Meiosis results in cell that have only 1/2 the number of chromosomes of normal somatic cells. different from mitosis? yes
b. Metaphase only occurs once during mitosis. different from meiosis? yes
c. Meiosis begins with DNA replication. diff from mitosis? NO even though this is true it is not the correct answer to the question

[there will usually be at least 4 and up to 6 possible answers. An answer could involving circling everything (all the above) but will NOT involve circling nothing (none of the above)]

Scenario Question
There is a 100mL sample taken from a 10,000L pond. It is serial diluted six times and 0.1 is plated and the colonies counted. the results are:
1:10 plate had TMTC (to many colonies to count)
1:100 plate had TMTC
1: 10^3 plate had 45 (choose the plate with the higher number because there is less room for error)
1:10^4 plate had 6
1:10^5 plate had 0
1:10^6 plate had 0

how to solve it
Step 1 -pick right plate-1:10^3
Step 2 -how many bacteria in 0.1mL of original sample-you add the number of zeros to the colony number so 45x 10^3
Step 3 -How many bacteria are in the original sample? - 100mL (original sample size)/ 0.1 mL (sample size we diluted and plated) = 1,000 and multiple that to the answer from step 2 so 45x10^6
Step 4-how many in the pond? -10,000L (pond size)/ 100mL or 0.1L (same thing, you have to watch the unit conversions…) =100,000 so the answer is 45x10^11 or in correct notation 4.5x10^12

Dr. Robson mentioned something about using the same method to weight grams of a chemical but I had to leave at this point so if someone who stayed wants to fill this in…..please?

and Dr. Robson also said that she expects us to be able to make the metric conversions in our heads so we should have those memorized…

Figures and related drawings will be accepted on the test for essay and short answer questions, but be clear to explain your figures and drawings.

There will be an extra credit point for all those that color the picture given. Crayons should be provided.

Thank you for posting this..

agreed thank you and we need to bring crayons to color the picture to get extra credit?

DxRR: Nope! You just bring your smiling, smart selves, and I'll bring the crayons!

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