3.2.1.1 Eukaryotic Cells

Question 1

What is the structure of the nucleus?

What is it made up of?

Answer 1

• nuclear envelope
• —–> double membrane surrounding the nucleus
• —–> controls entry and exit of materials into the nucleus
• nuclear pores
• —–> allows the passage of large molecules, such as messenger RNA
• nuceloplasm
• —–> jelly like, makes up most of the nucleus
• nucleolus
• —–> small spherical region
• —–> manufractures ribosomal RNA and ribosomes

Question 2

What are the functions of the Nucleus?

Answer 2

• act as a control center of the cell through production of mRNA and tRNA
• retain genetic material of the cell in form of DNA and chromosomes
• manufacture RNA and ribosomes

Question 3

Describe the structure of a mitochondrion?

Answer 3

• made up of a double membrane forming cristae
• cristae are extensions of the inner membrane
• cristae provide a large surface area for the attachment of enzymes and proteins involved in respiration
• matrix makes up the remainder
• contains protein, lipids, ribosomes and dna that allows the cell to produce some of their own proteins

Question 4

Function of mitochondria?

Answer 4

To produce the energy carrier molecule, ATP