How Well Do You Know Your Cells?
**Complete each sentence below with words from the box. One word will not be used.
OPTIONS:-(cells,
cell membrane,
cell walls,
chloroplasts,
cytoplasm,
Hooke,
Leeuwenhoek,
mitochondria,
nucleus,
organelles,
ribosomes,
vacuoles.)
1. All living things are made up of one or more_____.
2. In the 1660's, Robert______
viewed cork through
one of the first compound microscopes and gave the name "cells".
3. Around the same time, Anton van________
used
his own simple microscopes to view blood and microorganisms.
4. The structures that make up a cell are called_____.
5. The large, rounded "brain" near the center of the cell is the______.
6. The jellyish substance inside the cell but outside the nucleus is the______.
7. The cell's powerhouses which release energy from food are the_____.
8.______make most of the protein for the cell.
9.______act like storage areas within the cell.
10. Only plant cells have
________and______.
Answers
- cells
- Hooke
- Leeuwenhoek
- organelles
- nucleus
- cytoplasm
- mitochondria
- ribosomes
- vacuoles
- cell wall and chloroplast
Explanation:
Cells : A cell is the basic unit of the life .It is the smallest structural and the functional unit of the life which is typically microscopic and consists of cytoplasm and nucleus bounded by a membrane .
Cell membrane :
cell membrane is also known as the plasma membrane , it is a double layer of the lipids and the proteins that surrounds the cell and separates the cytoplasm from its surrounding environment . It is selectively permeable that means it follows only certain substances to exist or enter into the cells .
Cell walls :
A rigid layer of polysaccharides lying outside the plasma membrane cells of the plants , bacteria and fungi .In the algae and some higher plants it consists mainly of the cellulose .
chloroplasts : chloroplast are small organelles inside the cells the plants and the algae . They observe the light to make sugar in a process called the photosynthesis .The sugar can be stored in the form of a starch . chloroplast contain the molecule chlorophyll ,
which absorb sunlight for the photosynthesis .
Cytoplasm : The jelly like material that makes up the much of cell inside the cell membrane and in Eukaryotic cells , surrounds the nucleus .
Hooke : Hooke had discovered the plant cells . He Saw the cork of the tissues where he found mostly the dead cells .He had observed in the cork tissue that there are some cells which are mostly seem to be dead so the hook name them as the cells and remaining cells he considered them as a monastery .
Leeuwenhook : It was he who discovered the bacteria free living and parasitic microscopic protists, sperm and the blood cells .He was the first person who who used the microscope and he started discovery about the microscopic .
Mitochondria : Mitochondria are the simple cell organelles and they are found in the cytoplasm not in the nucleus .They make most of the cells and supply them ATP where as they are also known as the" powerhouse of the cell ".
Nucleus : Nucleus is a membrane bound structure that contains a sales heriditary information and control its growth and the reproduction .It is command centre of the cells .
Organelles: An organelle is a small part of the cell that has a specific function .The nucleus is itself as organelle ..............Organelle is diminutive organ which sports the organs of the body .
Ribosomes : Ribosomes are important cell organelle .Ribosomes are found in all the living organisms and these are known as the building proteins
vacuoles :vacuoles are membrane bound sacs within the cytoplasm of the cel that perform its function in the several ways .vacuoles are extremely important in providing the support as well as a performing in its functions and in the storage and and in many other ways .......etc.