WebAnswer: A smaller spherical body in the nucleus is called the nucleolus. Question 7: Name the scientist who coined the term cell. Answer: Robert Hooke coined the term ‘cell’. Question 8: Name one cell in human body which is spherical in shape. Or. Give an example of spherical cell. Answer: Spherical red blood cells. WebThough part of the function of the nucleus is to separate the DNA from the rest of the cell, molecules must still be able to move in and out (e.g., RNA). Proteins channels known as nuclear pores form holes in the nuclear envelope. The nucleus itself is filled with liquid (called …
Cell Structure and Functions Class 8 Science Extra Questions and Answers
WebKey points: Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide. WebDec 4, 2024 · The cytoplasm allows the internal structures to move around a little bit, but not as much as if they were in water. Cytoplasm is mostly made up of water, but it does contain other components that ... de stock today price
Cell Structure and Function Class 8 Notes Science Chapter 8
WebOct 27, 2024 · Two major regions can be found in a cell. The first is the cell nucleus, which houses DNA in the form of chromosomes. The second is the cytoplasm, a thick solution mainly comprised of water, salts, and proteins. The parts of a eukaryotic cell responsible for maintaining cell homeostasis, known as organelles, are located within the cytoplasm. WebOct 13, 2024 · The blank-looking structures in the cytoplasm are called vacuole. 24. Plastids are the coloured organelles, that are found in plant cells only. 25. Green coloured plastids are called chloroplasts. Class 8 Science Chapter 8 Notes Important Terms. Cell: Cell is the basic structural and functional unit of all living organisms. WebThe nucleus. The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA … deston metal wall art