1) Which cell organelle is known as the power house of cell?
2) Which type of lens is used in a microscope? (convex/concave)
3) What are the functions of Ribosome & Vacuole?
4) What is known as protoplasm & Cytoplasm?
5) Why is a mirror fixed in a microscope?
6) Why do we use a slide made of glass to place the material to be observed?
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Answers
1) Mitochondria
Reason: Because they are responsible for making adenosine triphosphate (ATP), the cell's main energy-carrying molecule.
2) Convex lens
Reason: The lens is thinner at the centre than at the edges.The convex lens give enlarged. Virtual image when it is placed between pole and principal focus.
3) Ribosomes:
- It assembles amino acid to form proteins that are essential to carry out cellular functions.
- The DNA produces mRNA by the process of DNA transcription
Vacuole:
- A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance
4) Cytoplasm:
The Difference Between Cytoplasm and Protoplasm are confusing because the meaning they convey are often interchanged. It is now known that the “cell” comprises of many organelles (Ribosomes, Endoplasmic reticulum etc) which perform specific functions. These cells organelles are engulfed in a gel like substance called Cytosol. This is collectively known as cytoplasm. But it doesn’t include the nucleus.
Protoplasm:
A protoplasm on the other hand, includes the cytoplasm + the nucleus. Therefore, cytoplasm is part of the protoplasm. The other thing to note is that the term “Protoplasm” is no longer technically used and is considered obsolete in modern biology. The term was used in the 1800s and described a number of things over the course of a century. The term is now mostly accepted a general term for cytoplasm.
5) A microscope's mirror is used to focus light onto the substance being studied. The part of the microscope fixed below the stage is used to focus light onto the substance being studied. In this configuration, there are two planes, a plane mirror for reflecting sunlight and a concave mirror for reflecting artificial light, both of which are fixed in a metal ring.
6)A prepared slide that is made up of a microscope slide, specimen and a cover slip not only gives the viewer better control over the specimen, but protects the microscope as well. The cover slip protects the ocular lens from damage by acting as a barrier between it and the specimen.