MINERALS QUIZ

On the ribosome, mRNA binds

none of these

to the small subunit

between the subunits

to the large subunit

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has unusual bases?

mRNA

tRNA

hnRNA

rRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following amino acid starts all proteins synthesis?

Thymine

Methionine

Proline

Glycine

TRUE ANSWER : ?
YOUR ANSWER : ?

Amino acids are joined together into a protein chain by which of the following?

Transfer RNA

Messenger RNA

DNA polymerase

Hydrogen bonds

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon contains the z, y and a structural genes

encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively

None of these

encoding p-galactosidase and galactose permeases

encoding P-galactosidase only

TRUE ANSWER : ?
YOUR ANSWER : ?

The growing polypeptide chain is released from the ribosomes when

a chain terminating codon is reached

a chain terminating tRNA binds to the ribosome

the poly A tail is reached

the 7-methyl guanosine cap is reached

TRUE ANSWER : ?
YOUR ANSWER : ?

Processive synthesis is a characteristic feature of

DNA mismatch repair

DNA Pol III at a replication fork.

removal of RNA primers on Okasaki fragments.

all DNA polymerases.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not necessary for protein synthesis to occur, once transcription is completed?

Ribosomes

DNA

tRNA

mRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

A polysome could be best described as

an active site of DNA synthesis.

an active site of protein synthesis.

an active site of lipid synthesis.

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Signal peptide protein removal that is translocated across a membrane is accomplished by

fMet aminopeptidase

signal peptidase

chymotrypsin

trypsin

TRUE ANSWER : ?
YOUR ANSWER : ?

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