draw and label the diagram of plant cells
draw the diagram of cell organelles and explain its function
differentiate protoplasm and cytoplasm
compare an eletron microscope and compound microscope
draw the diagram of nucleus and label its parts
describe the parts of nucleus with function
differentiate prokaryotes and eukaryote with examples
describe different plastids and their function
explain the reason of change in colour and taste while fruits ripen
which are the cell organelles only present in animal cell, and write their functions.
Answers
Answer
An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.
Eg:- Mitochondria, ribosome, plastid, nucleus, endoplasmic reticulum, lysosomes, golgi apparatus etc are cell organelles.
The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division. Anatomically the nucleus is made up of several components: nuclear envelope, nuclear lamina, nucleolus, chromosomes, nucleoplasm are some of these components.
Prokaryotic Cell Eukaryotic cell
Nucleus is absent Nucleus is present
One chromosome is present, More than one number of
but not true chromosome plastids chromosomes is present.
Unicellular Multicellular
Endoplasmic reticulum absent Endoplasmic reticulum
present
Transcription occurs in the cytoplasm Transcription occurs inside the
nucleus.
Examples: Bacteria and Archaea Examples: Protists, Fungi, Plants,
and Animals
Amyloplasts – Amyloplasts are greatest among all three and they store and synthesize starch. Proteinoplasts – Proteinoplasts help in storing the proteins that a plant needs and can be typically found in seeds. Elaioplasts -Elaioplast helps in storing fats and oils that are needed by the plant.
Colourful chemicals in ripening fruit help to preserve it and signal to animals that they are ready to eat. Unripe fruits are green because of chlorophyll in their cells. As they ripen, the chlorophyll breaks down and is replaced by orange carotenoids and red anthocyanins.
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. ... These structures include: chloroplasts, the cell wall, and vacuoles.
