pack 8

Question 1

What is the function of mRNA?

Answer 1

transfers DNA code to ribosomes for translation.

(it transfers the message to the intended receiver)

Question 2

What is the function of tRNA?

Answer 2

brings amino acids to ribosomes for protein synthesis.

(it transfers the material for the production of protein)

Question 3

What is the function of rRNA?

Answer 3

Ribosomes are made of rRNA and proteins.

Question 4

What is the function of hnRNA or pre-mRNA? Where is it found?

Answer 4

It represents precursors of mRNA (only found in the nucleus of eukaryotes)

Question 5

What is the function of Small nuclear RNA (snRNA)?Where is it found?

Answer 5

only found in the nucleus of eukaryotes

participate in splicing (removal of introns) mRNA

(from the name, it makes it small since it splices it, and when you think of an RNA that comes of the nucleus, you think of the mRNA)

Question 6

What is microRNA (miRNA) and what is its function?

Answer 6

It is short non coding

Some of them control the expression or repression of certain genes

(micro, bc micro sd cards can affect the way that a pc works sometimes)

Question 7

What are Ribozymes? Where are they found?

Answer 7

RNA molecules with enzymatic activity

Found in:They are found in both prokaryotes and eukaryotes

Question 8

What are the functions of RNA polymerase II

Answer 8

Searches DNA for initiation site.

unwinds the DNA

adds the ribonucleotide and connects them togther to the RNA strand.

Detects termination signals where transcription ends

Question 9

what do transcription factors do?

Answer 9

Transcription factors regulate gene expression by binding to DNA, recruiting RNA polymerase, and either activating or repressing transcription.

Question 10

What is the function of the general transcription factors?

Answer 10

combine with RNA polymerase to form a **preinitiation complex **that is competent to initiate transcription as soon as nucleotides are available.

(bc the general job is to start the transcription)