Question

Which of the following is surrounded by two phospholipid bilayers?
(A) lysosomes
(B) ribosomes (C) nucleolus
(D) nucleus​

Answer 1

Hii mate.......





Nucleus is ur answer........





Hope it helps you mate ✌️✌️✌️✌️✌️✌️✌️✌️

Answer 2

(D) Nucleus​ is surrounded by two phospholipid bilayers.

Nucleus:

• In terms of genomics, a nucleus is an organelle within a cell that is membrane-enclosed and houses the chromosomes.
• The nuclear membrane has a variety of pores that enable the selective passage of specific molecules (such as proteins and nucleic acids) into and out of the nucleus.
• The nucleus carries the genes, and structures that hold the genetic information, and controls and regulates the functions of the cell (such as growth and metabolism).
• Small structures called nucleoli are frequently detected inside the nucleus.
• The nucleoplasm is the gel-like matrix in which the nuclear parts are suspended.

Lysosomes:

• Proteins, nucleic acids, carbohydrates, and lipids can all be broken down by the variety of enzymes found in lysosomes, and membrane-enclosed organelles.
• Numerous cell processes involve lysosomes.
• They disassemble extra or worn-out cell components.
• They could be utilized to eliminate invasive bacteria and viruses.

Ribosomes:

• The process of making proteins in a cell takes place at an intercellular structure called a ribosome, which is formed of both RNA and protein.
• The messenger RNA (mRNA) sequence is read by the ribosome, which then converts the genetic code into a specific string of amino acids that develop into extended chains and fold to create proteins.

Nucleolus:

• The largest nuclear organelle, the nucleolus, is where ribosomal subunit biogenesis mostly occurs in eukaryotic cells.
• It forms specialized chromosomal structures called nucleolar organizing regions (NORs), which are the locations of ribosomal DNA transcription. These NORs are formed around arrays of ribosomal DNA genes.

#SPJ3