Carry out the following osmosis experiment.
[question] Question. Carry out the following osmosis experiment. Take four peeled potato halves and hollow each one out to make potato cups. One of these potato cups should be made from the boiled potato. Put each potato cup in the trough containing water. Now (a) Keep cup A empty. (b) Put one tea spoon sugar in cup B. (c) Put one tea spoon of salt in cup C. (d) Put one tea spoon sugar in boiled cup D. Keep this set up for two hours. Then observe the four potato cups and answer the following: (i...
What is osmosis ?
[question] Question. What is osmosis ? [question] [solution] Solution: Osmosis is diffusion of water from the region of its higher concentration (pure water or dilute solution) to the region of its lower concentration (strong solution) through a semiper meable membrane. [/solution]...
How does Amoeba obtain food ?
[question] Question. How does Amoeba obtain food ? [/question] [solution] Solution: Plasma membrane of Amoeba is flexible. With its help, Amoeba engulfs food particle. The engulfed food particle passes into the body of Amoeba as a phagosome. Phagosome com bines with lysosome to produce digestive or food vacuole. Digestion occurs in food vacuole. The digested food passes into surrounding cytoplasm. The undigested matter is thrown out of the cell. [/solution]...
Where do the lipids and proteins constituting
[question] Question. Where do the lipids and proteins constituting the cell membrane get synthesised ? [question] [solution] Solution: Proteins are synthesised over ribosomes of RER while lipid are synthesised over SER. [/solution]...
What organelle is known as
[question] Question. What organelle is known as power house of the cell ? Why ? [question] [solution] Solution: Mitochondria is known as power house of the cell because it produces most of the molecules of ATP (adenosine triphosphate) which are required for providing energy for synthesis of new chemicals, mechanical and other cellular functions. [solution]...
What would happen to the life
[question] Question. What would happen to the life of a cell if there was no Golgi apparatus ? [/question] [solution] Solution: There would not be any lysosome for intracellular digestion and cleansing, no complexing of molecules, no excretion and no formation of new plasma membrane. [/solution]...
What would happen if the plasma
[question] Question. What would happen if the plasma membrane ruptures or breaks down ? [/question] [solution] Solution: There will be spilling of cytoplasm and cell organelles, bursting of lysosomes and digestion of cellular contents. [/solution]...
How is a prokaryotic cell different from a eukaryotic cell?
[question] Question. How is a prokaryotic cell different from a eukaryotic cell? [/question] [solution] Solution: [/solution]...
Make a comparison and write down ways
[question] Question. Make a comparison and write down ways in which plant cells are different from animalcells. [/question] [solution] Solution: [/solution]...
Where are proteins synthesized inside the cell ?
[question] Question. Where are proteins synthesized inside the cell ? [/question] [solution] Solution: Ribosome in the Cytoplasm, Rough endoplasmic reticulum. [/solution]...
Why are lysosomes known as suicidal bags ?
[question] Question. Why are lysosomes known as suicidal bags ? [/question] [solution] Solution: At the time of cellular damage, the lysosomes burst to release its enzyme and they digest its own cell. Therefore, lysosomes are also known as suicidal bags of a cell. [/solution]...
If the organisation of a cell is destroyed due to some physical
[question] Question. If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen? [/question] [solution] Solution: Lysosomes will burst to release digestive enzymes. Digestive enzymes cause break down of various cellular component causing destruction of the cell. [/solution]...
Can you name the two organelles we have studied
[question] Question. Can you name the two organelles we have studied that contain their own genetic material? [/question] [solution] Solution: Mitochondria, chloroplast - are two orgonelles that contain there own gentc material. [/solution]...
Fill in the gaps in the following table illustrating
[question] Question. Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells. [/question] [solution] Solution: [/solution]...
Why is plasma membrane called
[question] Question. Why is plasma membrane called selectively permeable membrane? [/question] [solution] Solution: Cell membrane is semipermeable membrane for water. It permits the entry of gases through diffusion. Ions, sugar, amino acids, etc. pass through the plasma membrane by an active process. Plasma membrane is impermeable to certain other materials. Therefore, it is selectively permeable. [/solution]...
How do substances like
[question] Question. How do substances like $\mathrm{CO}_{2}$ and water move in and out of the cell ? [/question] [solution] Solution: $\mathrm{CO}_{2}$ moves into and out of the cell by diffusion while water does it through osmosis. [/solution]...
Why is the cell called structural and functional unit of life?
[question] Question. Why is the cell called structural and functional unit of life? [/question] [solution] Solution: A living organism is made up of one or more cells. Therefore, cell is structural and functional unit of life. All life functions of an organism reside in its cells. As the different parts of human body perform different functions. Similarly division of labour is also seen within a single cell. In fact each such cell has got certain specific components within it known as cell organ...
Who discovered cell and how ?
[question] Question. Who discovered cell and how ? [/question] [solution] Solution: Robert Hooke (1665). The scientist found that cork possesses a number of small box-like structure which he named cell (cellula which later abbreviated to cell). His work was published in the form of a book called “Micrographia”. [/solution]...