Fill in the blanks :
The _________is the control centre of the cell.
The instrument used to see tiny objects is called a _________.
The cell wall is made up of _____________.
Energy is produced in _________________.
The _____________,_______________ and __________ are parts of a cell.
Answer these questions:
Why a cell is called the structural and functional unit of a living organism?
What are ribosomes?
List the functions of mitochondria?
Nucleus is the most important part of a cell. Explain this statement.
Lysosomes are called suicide bags of the cell. Why?
Answers
Answer:
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Explanation:
1)The control center of the cell is its nucleus.
2)A microscope is an optical instrument used to view small objects by enlarging them with two convex lenses. Optical microscopes, used for research, illuminate samples with visible or ultraviolet light. ... Different types of microscopes are used based on the desired level of magnification
3)The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides. In secondary cell walls, lignin may be deposited.
4)There are several types of cellular energy production. Plants produce energy from light through a process known as photosynthesis. Eukaryotic cells use their mitochondria to generate ATP through a process called cell respiration.
5)A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm.
Answer these questions:
1)The cell is called the structural and functional unit of life as all living organisms are made up of cells. Cells are also essential for performing various life processes required for sustaining life. Furthermore, cells provide form and structure, process nutrients and convert it into useable energy.
2) a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.
3)Function. The mitochondrion is the site of ATP synthesis for the cell. The number of mitochondria found in a cell are therefore a good indicator of the cell's rate of metabolic activity; cells which are very metabolically active, such as hepatocytes, will have many mitochondria.
4)Function. The most prominent roles of mitochondria are to produce the energy currency of the cell, ATP (i.e., phosphorylation of ADP), through respiration, and to regulate cellular metabolism. The central set of reactions involved in ATP production are collectively known as the citric acid cycle, or the Krebs cycle.
explain why??
1)The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane‐bound organelle that harbours the genetic material in the form of chromatin.
2) For example, when cell gets damaged, lysosome may burst and the enzymes digest their own cell. Therefore lysosomes are known as the Suicidal bags of a cell or we can say that they posses different kind of hydrolases on release of these enzymes that cause death of cell
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Answer:
the nucleus is the control center of the cell