Ribosomes

Question 1

Where are ribosomes formed?

Answer 1

In the nucleolus

Question 2

What are ribosomes composed of?

Answer 2

rRNA and proteins

Question 3

What type of ribosomes are found in eukaryotic cells?

Answer 3

80s (60s and 40s)

Question 4

What type of ribosomes are found in prokaryotes, mitochondrial and chloroplasts?

Answer 4

70s (50s and 30s)

Question 5

Where are ribosomes found?

Answer 5

Found freely in the cytoplasm or as part of the rough ER in eukaryotic cells

Question 6

Function of ribosomes?

Answer 6

Protein synthesis- specifically the translation of mRNA into polypeptide chains

Question 7

Formation of ribosomes?

Answer 7

Formed by rRNA synthesis
rRNA is transcribed from ribosomal DNA in the nucleolus

Question 8

Ribosomal proteins?

Answer 8

These proteins are synthesised in the cytoplasm and imported into the nucleus

Question 9

Assembly in the nucleolus?

Answer 9

rRNA and ribosomal proteins combine to form ribosomal subunits

Question 10

Export to cytoplasm?

Answer 10

These subunits are exposed to the cytoplasm where they come together to form ribosomes during protein synthesis