Protein Synthesis

The main function of tRNA is to...

• carry a message that, when translated, forms proteins

• bring amino acids from the cytoplasm to the ribosomes

• form a portion of ribosomes

• string together complementary RNA and DNA strands

The "blueprint" is found in the nucleus of each cell in the form of DNA.

• True

• False

Proteins are needed for:

• fighting diseases as antibodies

• repair of wounds and growth

• transport across the cell membrane

• cellular respitation

• enzymatic function in cell processes

__________ are molecules that are made up of amino acids. The amino acid Methionine correlates with the __________ codon.

1. The DNA unwinds. 2. The hydrogen bonds between the nucleotides are broken by _______________. 3. The promoter attracts the _________________________. This enzyme attaches ________________ , thus converting a gene of DNA to _________________. 4. This molecule will go through editing and leave the cell's nucleus through the ______________This step of protein synthesis is called _____________________

How many nucleotides in DNA or mRNA code for a specific amino acid?

• one

• two

• three

• four

The three adjacent nucleotides in the mRNA that code for an amino acid are called a(n) _______________. The three complementary nucleotides that the tRNA brings are called _________________.

A gene can be all of the following EXCEPT

• a set of instructions for a trait

• a portion of a strand of DNA

• instructions for making a protein

• a complete chromosome

The second step of protein synthesis is ________________________. It is also called ________ expression. It starts when the small subunit and the large subunit of the ______________, join to receive the _________.

•The different types of ____________________________ are made by the different combinations of the ______ amino acids.