LONG ANSWER TYPE QUESTION
(Qi) Explain how cell differ from each other in shape, size, and number.
(Qii) How would you prepare a slide of a human cheek for viewing?
(Qiii) With the help of a labelled diagram, explain the role of any five organelles present in the cytoplasm of a generalized cell.
(Qiv) With the help of a labelled diagram, explain the structure of a nucleus.
(QV) Differentiate between plant and animal cells.
Answers
Answer:
Hope it helps please mark me as the Brainliest
Explanation:
1- Cells greatly vary in their shape and sizes because of their varied and distinct function. Their shape and size is all related to the type of activity or function they are involved in.
2- Take a clean cotton swab and gently scrape the inside of your mouth.
Smear the cotton swab on the centre of the microscope slide for 2 to 3 seconds.
Add a drop of methylene blue solution and place a coverslip on top. ...
Remove any excess solution by allowing a paper towel to touch one side of the coverslip.
Place the slide on the microscope, with 4 x or 10 x objective in position and find a cell. Then view at higher magnification.
Human Cheek CellMethylene blue stains negatively charged molecules in the cell, including DNA and RNA. This dye is toxic when ingested and it causes irritation when in contact with the skin and eyes.
The cells seen are squamous epithelial cells from the outer epithelial layer of the mouth. The small blue dots are bacteria from our teeth and mouth.
3- The main parts of a generalized cell are cell membrane, cytoplasm, and nucleus.
Cell membrane: It is the outer covering of a cell. It is a porous membrane through which selected substances can enter or leave the cell. The cell membrane is also called plasma membrane.
Cytoplasm: It is a jelly-like fluid that fills up the part of the cell between the cell membrane and the nucleus. Several organelles are embedded in the cytoplasm.
Nucleus: It is considered to be the brain of the cell. Nucleus is surrounded by a membrane called the nuclear membrane and is filled with a semi-solid substance called the nucleoplasm.
4- Nucleus has an outer double layered nuclear membrane with nuclear pores, a transparent granular matrix called nucleoplasm or karyolymph, chromatin network composed of DNA and histones and a darkly stainable spherical body called Nucleolus.
5- Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not. Chloroplasts enable plants to perform photosynthesis to make food.
Refer to the image for diagram of question 4
