Nucleus and Nucleolus

Which Arrow point to the structure that contains the machinery to replicate the DNA and Synthesize RNA

• A

• B

• E

• D

• F

Which arrow point to the nuclear pore?

• D

• E

• C

• B

• A

The rER is continuous with which structure?

• Outer mitochondrial membrane

• Inner membrane of the nuclear envelope

• Outer membrane of the nuclear envelope

• Inner mitochondrial membrane

Where does transcription take place?

• Constitutive heterochromatin

• Euchromatin

• Facilitative heterochromatin

• Nucleus

How do histones regulate genes?

• methylation only

• Acetylation only

• Methylation and Acetylation

Which histone “locks” DNA in place to prevent transcription?

• H2A

• H2B

• H3

• H4

• H1

What is an example of a matured cell with no nucleus?

• Hepatocytes

• Skeletal muscle

• RBCs

• Langhans

What structure is continuous with the inner nuclear membrane?

• Mitochondria

• rER

• Lamina

• Golgi apparatus

What is the characteristic of the Nuclear pore complex?

• Site of transcriptional activity

• Inclusion not bounded by a membrane that is observable only during interphase

• Continuous with the rER

• Controls movement of protein in and out of the nucleus

What is the function of the structure E in the diagram?

• DNA transcription and synthesis

• Transfer of ribosomal RNA into the lumen of the unclear envelope

• Synthesis of most, but not all ribosomal proteins

• Packaging of mRNA and tRNA

• Synthesis of rRNA