Draw a diagram of a human cell, include; the Nucleus, the Golgi Apparatus, Lysosomes, Ribosomes and Mitochondria, annotating your diagram with the general functions of each component and of the cell membrane.

Nucleus: Contains the DNA/ Human genome in the form of chromosomes (with the help of histone proteins), within a nuclear membrane which is inpenetrable by cytosolic enzymes.

Golgi Apparatus: Transport/ modification/ packaging of proteins and lipids.

Lysosomes: Contain enzymes that break down biological polymers such as nucleic acids, carbohydrates and proteins.

Ribosomes: During translation, ribosomes attach to mRNA molecules and decode the sequence by aligning them with complementary tRNA molecules. Each tRNA molecule holds a specific amino acid and as they line up, peptide bonds form between adjacent amino acids, forming the desired protein product. However, the protein can then be post-translationally modified by phopshorylation, methylation or enzymatic cleavage to form the final functional protein. 

Mitochondria: Generate energy in the form of ATP (Adenosine Triphosphate) by the breakdown of sugars and fats, this process occurs via the citric acid cycle.

Cell membrane/ Phospholipid Bilayer: Signalling (hormones/ neurotransmitters/ secondary messengers such as cAMP, endocrine/ autocrine/ paracrine), structure of cell, recognition of pathogens, markers of 'self proteins' to immune cells, organisation of components for a particular cell type/ function, etc.

Answered by Victoria T. Biology tutor

6437 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe transcription:


What is a mutation and what are the consequences of one?


Why do mutations makes it difficult to create a vaccine ? (4 marks - has the potential to be worth more in an exam)


What is the significance of performing mouth-to-mouth breaths during CPR?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences