Nucleus

What is the structure that controls all the activities of a cell?

• Ribosome

• Nucleus

• Mitochondrion

• Lysosome

Where are the proteins necessary for the nucleus produced?

• Inside the nucleus

• In the cytoplasm

• In the chromatin

• In the endoplasmic reticulum

What is the double membrane surrounding the nucleus called?

• Nuclear envelope

• Cytoplasmic membrane

• Chromosome

• Lamina

Which molecules leave the nucleus to participate in protein synthesis?

• DNA

• RNA

• Proteins

• Lipids

What is contained inside the nucleus?

• Only DNA

• DNA and chromatin

• Only RNA

• Membranes

What are the units of DNA wrapped around histone proteins called?

• Chromatids

• Nucleosomes

• Centromeres

• Genes

How many chromosomes are in a diploid human cell?

• 23

• 46

• 22

• 44

What is the nucleolus?

• An organelle

• A subdomain of the nucleus involved in ribosome synthesis

• A type of chromatin

• A type of membrane

What are the heterochromatin regions of DNA that remain transcriptionally inactive?

• Euchromatin

• Centromeres

• Telomeres

• Condensins

Which phase of the cell cycle is the longest?

• Mitosis

• S phase

• G1 phase

• G2 phase