Activities of the Cell I.Cell Factory II.Cell Energy III.Cell Cycle.

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Activities of the Cell I. Cell Factory II.Cell Energy III.Cell Cycle

Transcript of Activities of the Cell I.Cell Factory II.Cell Energy III.Cell Cycle.

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Activities of the CellI. Cell Factory

II. Cell Energy

III. Cell Cycle

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I. The Cell Factory: Protein Production, From Start to Finish

=

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DNA genetic traits?

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T A C

A U G A A G C A U G A C

T T C G T A C T G

DNA

mRNA

1. Transcription of DNA

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mRNA

U A C

A U G A A G C A U G A C

C U G U U C G U A

tRNA with amino acid

2. Translation of mRNA to protein

anticodon

codon

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C U G

A U G A A G C A U G A C

U U C G U A

U A C

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C U G

A U G A A G C A U G A C

U U C

G U A

U A C

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C U G

A U G A A G C A U G A C

U U C G U A

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C U G

A U G A A G C A U G A C

G U A

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Note: Translation occurs at the ribosomes of the rough ER

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amino acid chart

HISTIDINE - U U G - A A G - C A U - G A C

LEUCINE - ASPARTIC ACIDLYSINE -

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transcription

gene mRNA protein (amino acid

chain)

translation

• Gene expression

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II. How Does a Cell Obtain Energy From “Food?”

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Cellular Respiration

6 CO2

carbondioxide

energy!

+ 36 ATPC6H12O6

glucose

+ 6 O2

oxygen

+ 6 H2Owater

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A) Aerobic respiration - the process that releases energy (ATP) by breaking down glucose, in the presence of oxygen

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occurs at rest, or . . .

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when you are bringing it!

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• occurs along the cristae of the mitochondria

• two stages:

Kreb’s cycle electron transport chain

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Cellular Respiration Starts with . . .

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B) Anaerobic respiration -produces ATP by breaking down glucose without oxygen

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lactic acid fermentation (e.g. sore muscles, yogurt, cheese, pickles, kimchi)

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Energy Tally

• Anaerobic = 2 ATP

• Aerobic respirationGlycolysis 2 ATP

Kreb’s cycle 2 ATPElectron Transport 32

ATP

+36 ATP

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III. What Are the Stages in the Life of a Cell?

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Cell Cycle

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G1 cell growthS DNA replicatesG2 preparation for cell division

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nucleus (w/ nuclear membrane)

cell membrane

DNA (genetic instructions)

A Typical Cell

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during G1DNA is in chromatin form (“loose” threads)

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before cell division

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DNA is replicated and forms chromosomes

before cell division

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Cell Cycle

Starts here

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Cell Cycle

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Cell division• 4 Stages of Mitosis (chromosomes

separate)•Prophase•Metaphase•Anaphase•Telophase

• Cytokinesis (cell splits)

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Stages of Mitosis

earlyprophase

metaphase

anaphaseanaphase

cytokinesiscytokinesis

lateprophase

telophasetelophase

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Where should you look in an organism to find mitosis?