Nuclear Structure

What goes into the Nuclear Pore Complex?

• Control Signals, Building Materials and Energy

• Intermediate Filaments

• mRNA, tRNA and subunits

• Amine derived glycoproteins

What goes out of the Nuclear Pore Complex?

• Phospholipids

• DNA bases

• mRNA, tRNA and subunits

• Fatty acid binding proteins

What is the nuclear lamina composed of?

• Microtubules

• Intermediate filaments

• Microfilaments

• Phospholipids

What is responsible for making Ribosomal RNA?

• ER

• sER

• Mitochondria

• Nucleolus

What is Euchromatin?

• More dense DNA that contains genes not being used by the cell

• Less dense RNA that contains genes being used by the cell

• Less dense DNA that contains genes being used by the cell

• More dense RNA that contains genes not being used by the cell

What is heterochromatin?

• Less dense DNA that contains genes not being used by the cell

• More dense RNA that contains genes not being used by the cell

• Less dense DNA that contains genes being used by the cell

• More dense DNA that contains genes not being used by the cell

What is a nucleosome?

• Metaphase chromosomal structure

• Protein aggregates

• A histone protein wrapped around DNA

• A bead of DNA wrapped around histone proteins

What is Chargaff’s First Rule?

• The composition of DNA varies between species

• A pairs with T and C pairs with G

• Genetic diversity is due to mutation

• More complex organisms contain larger quantities of DNA

What is Chargaff’s Second Rule?

• Alleles are specific forms of a gene

• A = T and C = G

• Dominant alleles are expressed in the phenotype over recessive alleles

• The composition of DNA varies between species

Where in a cell are ribosomes assembled once transported out of the nucleus?

• rER

• Cytoplasm

• sER

• Free ribosomes