If the ribosomes of a cell were destroyed, what effect would this most likely have on the cell? (1) It would stimulate mitotic cell division. (2) The cell would be unable to synthesize proteins. (3) Development of abnormal hereditary features would occur in the cell. (4) Increased protein absorption would occur through the cell membrane.

Instruction on gene in nucleus. Synthesis at ribosome. PROTEIN SYNTHESIS Amino acids Protein chain! Instruction on gene in nucleus. Synthesis at ribosome.

BTW, how many letters does English use? Genes use code (language). The code has four letters: A, T (U), C, G. BTW, how many letters does English use? All organelles involved in the process (nucleus, ribosome, etc.) use this code. Let’s learn…

RNA has Uracil (U), instead of Thymine (T). DNA RNA T C G A A G C U U

Three letters write a genetic codon (word). Each codon refers to a specific amino acid.

For example: C U C = C A U = A U G = Three letters write a genetic codon (word). Each codon refers to a specific amino acid. For example: C U C = C A U = A U G =

Sometimes different codons refer to the same amino acid. For example: C G U C G C C G A C G G A G A A G G all equal

Let’s practice transcribing codons.

Let’s practice transcribing (these) codons. A G C Codon 1 = __________ U U A Codon 2 = __________ C C G Codon 3 = __________ A U U Codon 4 = __________ DNA code RNA codons

THREE The diagram below is a section of a sequence of DNA How many codons does the sequence contain? THREE What would the complementary RNA sequence be? GUAAUCUUG

Let’s practice translating codons.

Let’s practice translating codons.