What are the lumpy brown structures are digestive? Lysosomes are called suicide sacks. They are produced by the golgi body. They consist of a single membrane surrounding powerful digestive enzymes. Those lumpy brown structures are
What are the lumpy brown structures are digestive?
Lysosomes are called suicide sacks. They are produced by the golgi body. They consist of a single membrane surrounding powerful digestive enzymes. Those lumpy brown structures are digestive enzymes.
What happens when the membrane surrounding lysosome breaks?
Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. If the cell is damaged beyond repair, lysosomes can help it to self-destruct in a process called programmed cell death, or apoptosis.
What organelle synthesizes lysosomes?
Lysosomal enzymes are synthesized in the endoplasmic reticulum (ER), are transported to the Golgi apparatus, and are tagged for lysosomes by the addition of mannose-6-phosphate label.
What does the smooth ER do?
The smooth endoplasmic reticulum functions in many metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids. The smooth endoplasmic reticulum also carries out the metabolism of carbohydrates and steroids.
What is in the nucleolus?
The nucleolus is the site of transcription and processing of rRNA and of assembly of preribosomal subunits. Thus it consists of ribosomal DNA, RNA, and ribosomal proteins, including RNA polymerases, imported from the cytosol.
What is a Centriole function?
Centrioles are primarily involved in forming two structures-centrosomes and cilia. Centrioles bias the position of spindle pole formation, but because spindle poles can self-organize, the function of the centriole in mitosis is not obligatory.
What is RER and SER?
Quick look. Rough ER (RER) is involved in some protein production, protein folding, quality control and despatch. It is called ‘rough’ because it is studded with ribosomes. Smooth E R (SER) is associated with the production and metabolism of fats and steroid hormones.
Who discovered the nucleolus?
Felice Fontana
Felice Fontana in 1774 discovered nucleolus. It is a dense region rich in DNA, RNA, and proteins that are formed from nucleolar organizing regions which are specific regions on chromosomes.