Nucleic acid, DNA and RNA

NUCLEIC ACIDSĀ  Nucleic acids are so called because they are slightly acidic and present mainly in the nucleus. The two types of nucleic acid, DNA and RNA, both contain carbon, hydrogen, oxygen, nitrogen and phosphorus. Nucleic acids are polymers of nucleotides. Nucleotides are the building blocks of nucleic acids. A nucleotide consists of three units: A sugar (ribose or deoxyribose), ...

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Proteins, Characteristics, Structure and Types

THE PROTEINS Proteins are polymers of amino acids, the compounds containing carbon, nitrogen, oxygen and hydrogen Proteins are the most abundant organic compounds in cells. They are over 50% of total dry weight of the cell. About 170 types of amino acids are present in the cells and tissues. Of these, about 25 types are involved in the formation of ...

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Genetic Cloning Procedure and Importance of Cloning

CLONING: Cloning is a technique in which identical copies are produced by asexual means. A cell or individual and all its asexually produced off springs. EXPLANATION: All members of a clone are genetically identical except when a mutation occurs. In 1997 scientists in Scotland succeeded in cloning a sheep (dolly). Other mammalian species (mice and cows) have since been cloned. ...

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Introduction to Biology, Notes & Key Points

The elements which occur in a particular organism are called bioelements. There are 92 natural elements. 16 elements and a few others in an organism are the bioelements. Bioelements are of two types: (i) MAJOR BIOELEMENTS: These are required in higher amounts. Examples are oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus. (ii)MINOR BIOELEMENTS:These are required in smaller amounts. Examples are ...

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Introduction to Biology & Branches Of Biology

The physical world including all natural phenomena and living things is called nature. The biologists study the living part of the nature. Biology is a branch of science which deals with the study of living things.Or it is a branch of science which deals with the study of life. “Life is a set of characters that distinguish living organisms from ...

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Chapter #1 Introduction to Biology MCQS

Which one is the best scientific method? (A) Experimentation in lab (B) Collecting all known facts on the subject (C) Developing and testing Hypothesis (D) Using sensitive electronic instruments Of the following, which is not characteristic of the theory? (A) It is more comprehensive than a hypothesis (B) It is limited in scope compared with a hypothesis (C) It has ...

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Information Technology Mcqs With Answers

Multiple Choices 1.The most common form in which a modern computer is found today is called: a. Super b. Mainframe c. Personal d. Notebook 2. Computers are: a. Accurate b. Consistent c. Reliable d. All 3. Which of the following is necessary to attain computer literacy? a. Awareness of importance of computers b. Knowledge Of the basics of how computers ...

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Kinetic Molecular Theory of Gases

KINETIC MOLECULAR THEORY OF GASES The gas laws give us the general behavior of gases. These laws are based on experimental observations and they are almost independent of the nature of gas. When we want to discuss the behavior of gases quantitatively, then we should appreciate the kinetic theory of gases given by Bernoulli in 1738. He was the first ...

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Collision Diameter, Collision Frequency, Collision Number and Mean Free Path

Collision Diameter, Collision Frequency, Collision Number and Mean Free Path In the kinetic molecular theory of gases, we come to know that the molecules of a gas aremoving randomly, colliding among themselves and with the walls of the vessel. During the collisions, they suffer a change in their directions and also change their velocities. The time for which the two ...

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Information Technology Exam Questions and Answers

Q.01. What is USB flash drive? Ans: A USB flash drive is portable and lightweight storage device. It is commonly used to transfer documents, photos, music and videos from one computer to other. Q.02. Define communication devices? Ans: The hardware components used to communicate and exchange data, instructions and information with other computers are called communication devices. Q.03. What is ...

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