What is responsible for unwinding the DNA and building the mRNA strand?
ribosomes
enzymes
tRNA
What must happen to the mRNA strand before it leaves the nucleus?
It must be replicated
It must be translated
It must be edited
Some important differences between DNA and RNA: Firstly that is double-stranded, while is a single-strand. DNA has the nucleotide , while RNA has . The of DNA is deoxyribose, while the of RNA is .
Proteins are made of one or more polypeptide chains.
Which of the following are functions of proteins? (tick all that apply)
Enzymes
Certain hormones
Main component of the plasma membrane
Immune system components
Body structures like hair and nails
A primary energy source
A back-up energy source
Polypeptide chains are made of amino acids linked together by hydrogen bonds.
Which of the following is correct for the steps of protein synthesis:
Transcription occurs at the ribosomes; the strand of mRNA is edited; the mRNA exits the ribosomes; the mRNA is translated into a polypeptide chain in the nucleus
Transcription occurs in the nucleus; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is translated into a polypeptide chain at the ribosomes
Translation occurs in the nucleus; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is transcribed into a polypeptide chain at the ribosomes
Translation occurs at the ribosomes; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is transcribed into a polypeptide chain in the nucleus
Which type of RNA are these statements describing: - The molecule has a distinctive folded structure with three hairpin loops that form the shape of a three-leafed clover - This type of RNA carries amino acids to the ribosome
mRNA
rRNA
