Railway RRB Group D Science Notes – Components of a Cell

Railway RRB B Exam for the Group D Posts is scheduled to begin from 23 February 2022. This leaves us with around 2 months for all the aspirants to complete their preparations for the Exam. To add to your preparation, we have created this Railway RRB Group D Science Notes blog about Components of a Cell. Questions related to this topic is asked in the general awareness section of the RRB Group D Exam. The information provided in this Railway RRB Group D Science Notes blog would prove very helpful for you to answer such questions.

Latest Updates On RRB Group D Exam Date

1. The CBT as per details provided in CEN No. RRC-01/2019 will commence tentatively from 23rd February 2022 in multiple phases, subject to the prevailing conditions and Government guidelines issued from time to time in view of handling of the Covid-19 pandemic.
2. The link of viewing Exam City and Date and downloading of Travelling Authority of SC/ST candidates will be made available on all RRB websites in due course i.e. 10 days prior to the start of the exam.
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4. In regards to 4,85,607 candidates whose applications were found rejected on the ground of invalid photograph and/or signature, for those the modification link will be live from 15.12.2021 to 26.12.2021 on all the official websites of RRBs for uploading of photograph and/or signature afresh as one time opportunity. Thereafter, the decision of RRBs regarding the validity of photograph/signature shall be final and binding on candidates. In this process, the candidates whose application was found accepted will also be scheduled in subsequent phases of the CBT exam of CEN No. RRC01/2019.

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Railway RRB Group D Science Notes – Cell and its Components

Parts of a Cell	Properties
PROTOPLASM	It is the living substance of the cell. It is a vicious, colourless fluid and is the seat for all physiological functions.
ENDOPLASMIC RETICULUM	The endoplasmic reticulum is a network of membranes found throughout the cell and connected to the nucleus. The membranes are slightly different from cell to cell and a cell’s function determines the size and structure of the ER.
RIBOSOMES	They are the smallest organelles of the cell. Ribosomes are the site of protein synthesis in the cell.
GOLGI COMPLEX	Also Known as  DICTYOSOMES. The main function of the Golgi complex is cell secretion. it packs and transports certain materials like proteins and polysaccharides out of the cells. It is involved in the formation of primary lysosomes.
MITOCHONDRIA	Mitochondrion is called ‘powerhouse of the cell’.
PLASTIDS	There are 3 types of plastids – Leucoplast, Chromoplast and Chloroplast. Leucoplasts are colourless plastids, found in the underground parts of plants which are not exposed to light. 1) Leucoplasts are colourless plastids, found in the underground parts of plants which are not exposed to light. 2) Chromoplasts are orange, yellow or red coloured plastids found in petals, fruits and roots in certain higher plants. The red colour of ripe tomatoes is the result of Chromoplasts which contain the red pigment lycopene 3) Chloroplasts are the most important and most common plastids found in all the photosynthesising cells except prokaryotes. Blue-green algae, however, lacks chloroplasts are orange, yellow or red coloured plastids found in petals, fruits and roots in certain higher plants. The red colour of ripe tomatoes is the result of Chromoplasts which contain the red pigment lycopene Chloroplasts are the most important and most common plastids found in all the photosynthesising cells except prokaryotes. Blue-green algae, however, lacks chloroplasts
LYSOSOMES	They are called the suicidal bags as when these are injured by a toxic substance, the enzymes thus released can digest the whole cell.

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That is to the end of this Railway RRB Group D Science notes blog about Components of a Cell. We hope you liked reading this blog. Keep checking this page for more blogs on Railway RRB Group D Science notes. All the best for the RRB Group D Exam.

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