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Plastids: Special cell organelles in Plants and Algae

Plastids: Special cell organelles in Plants and Algae

Cytoplasm of plant cell consists of discoid, oval or spherical bodies called Plastids. They are present in all plant except bacteria, fungi and blue green algae. Plastids are living. They are formed a fresh but arise from minute pre existing bodies called Protoplastids already present in embryonic cells. They multiply ...

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What is microRNA

microRNA : Special features and its Role

MicroRNAs are a class of post-transcriptional regulators. They are short ~22 nucleotide RNA sequences that bind to complementary sequences in the 3’ UTR of multiple target mRNAs, usually resulting in their silencing. MicroRNAs target ~60% of all genes, are abundantly present in all human cells and are able to repress ...

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Carbohydrate Metabolism - Basic Overview

Carbohydrate Metabolism – Basic Overview

Since all digestible forms of carbohydrates are eventually transformed into glucose, it is important to consider how glucose is able to provide energy in the form of Adenosine triphosphate (ATP) to various cells and tissues. Glucose is metabolized in three stages in carbohydrate metabolism. They are… Glycolysis the Krebs Cycle ...

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Deoxyribonucleic acid its Types : A-DNA, B-DNA and Z-DNA

Deoxyribonucleic acid its Types : A-DNA, B-DNA and Z-DNA

Nucleic acids are high molecular weight biomolecules. It can be divided into two types. they are DNA and RNA. DNA is deoxyribonucleic acid. The deoxyribonucleic acid exists in three different forms. Deoxyribonucleic acid its Types : A-DNA, B-DNA and Z-DNA: A-DNA: A-DNA is one of the many possible double helical structures ...

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Enzymes involved in DNA Replication

Enzymes involved in DNA Replication

A fundamental property of living organisms is their ability to reproduce. Bacteria and fungi can divide to produce daughter cells that are identical to the parental cells. Sexually reproducing organisms produce offspring that are similar to themselves. This article covers Enzymes involved in DNA Replication.  On a cellular level, this reproduction ...

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Polypeptide chain conformation - Ramachandran Plot

Polypeptide chain conformation – Ramachandran Plot

Ramachandran plot is a plot of the torsional angles – phi (φ)and psi (ψ) – of the residues (amino acids) contained in a peptide. In sequence order, φ is the N(i-1),C(i),Ca(i),N(i) torsion angle and ψ is the C(i),Ca(i),N(i),C(i+1) torsion angle. The plot was developed in 1963 by G. N. Ramachandran,  ...

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