Cell Biology

Cell Biology

by najma naeem

​Cytoplasm

​Cytoplasm is a thick solution that fills each cell and is enclosed by the cell membrane. ... All of the organelles in eukaryotic cells, such as the nucleus, endoplasmic reticulum, and mitochondria, are located in the cytoplasm.

​Cytoplasmic Organalles

​Cytoplasmic organelles are "little organs" that are suspended in the cytoplasm of the cell. Each type of organelle has a definite structure and a specific role in the function of the cell. Examples of cytoplasmic organelles are mitochondrion, ribosomes, endoplasmic reticulum, golgi apparatus, and lysosomes.

Multiple Choice

What could be Chemical composition of Cytoplasm

• Water and other dissolved substances

• Proteins and fats

• Lipids and fats

• Polyasccharaides

Open Ended

Give explanation of cytoplasm, Its composition and organalles

​Endoplasmic reticulum

​endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins . All eukaryotic cells contain an endoplasmic reticulum (ER). In animal cells, the ER usually constitutes more than half of the membranous content of the cell. Differences in certain physical and functional characteristics distinguish the two types of ER, known as rough ER and smooth ER.

Open Ended

Write difference in SER and RER

Open Ended

Write function of Endoplasmic reticulum

​Ribosomes

A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell. The ribosome reads the sequence of the messenger RNA (mRNA) and, using the genetic code, translates the sequence of RNA bases into a sequence of amino acids.​

Multiple Choice

Function of ribosomes is

• mRNA production

• Protein synthesis

• DNA Stabilizing

• Regulating transport of materials