NEET Exam  >  NEET Videos  >  Biology Class 12  >  Introduction to DNA & RNA

Introduction to DNA & RNA Video Lecture | Biology Class 12 - NEET

158 videos|393 docs|239 tests

FAQs on Introduction to DNA & RNA Video Lecture - Biology Class 12 - NEET

1. What is DNA and RNA?
Ans. DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are nucleic acids that play crucial roles in the storage and transmission of genetic information in living organisms. DNA is a double-stranded molecule that contains the genetic instructions for the development, functioning, growth, and reproduction of all known organisms. RNA, on the other hand, is a single-stranded molecule that assists in protein synthesis by transferring the genetic information from DNA to ribosomes.
2. How do DNA and RNA differ from each other?
Ans. DNA and RNA differ in several aspects. Firstly, DNA is double-stranded, while RNA is single-stranded. Secondly, DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. Additionally, DNA uses the nitrogenous bases adenine (A), thymine (T), cytosine (C), and guanine (G), whereas RNA uses adenine (A), uracil (U), cytosine (C), and guanine (G). Lastly, DNA is located in the nucleus of a cell, while RNA can be found in the nucleus as well as in the cytoplasm.
3. What are the functions of DNA and RNA?
Ans. The main function of DNA is to store and transmit genetic information. It contains the instructions for the formation of proteins and other molecules necessary for the development and functioning of an organism. RNA, on the other hand, has various roles. Messenger RNA (mRNA) carries the genetic information from DNA to ribosomes for protein synthesis. Transfer RNA (tRNA) brings amino acids to the ribosomes during protein synthesis. Ribosomal RNA (rRNA) is a component of ribosomes, where protein synthesis occurs.
4. How is DNA replicated?
Ans. DNA replication is a process in which a DNA molecule is copied to produce two identical DNA molecules. It occurs during the interphase stage of the cell cycle. The process involves the unwinding of the DNA double helix, separation of the strands by the enzyme helicase, and the synthesis of new complementary strands using DNA polymerase. Each resulting DNA molecule consists of one original strand and one newly synthesized strand, a process known as semi-conservative replication.
5. Can DNA be used for identification purposes?
Ans. Yes, DNA can be used for identification purposes. DNA fingerprinting, also known as DNA profiling, is a technique that analyzes specific regions of an individual's DNA to create a unique genetic profile. This profile can be used to establish biological relationships, determine the presence of genetic disorders, and identify individuals in forensic investigations. DNA identification is highly accurate and is widely used in criminal investigations, paternity testing, and establishing ancestral connections.
158 videos|393 docs|239 tests

Timeline

01:30 Nucleic Acids
01:41 DNA
01:53 Polymers
02:12 Three Ingredients
03:45 Base Pairs
04:13 Base Sequences
05:07 Pop Quiz
05:36 RNA
05:43 Three Differences from DNA
06:16 Biolo-graphy
08:49 Replication
09:22 Helicase & Unzipping
09:38 Leading Str&
10:08 DNA Polymerase
10:24 RNA Primase
10:46 Lagging Str&
11:07 Okazaki Fragments
11:47 DNA Ligase
More
Explore Courses for NEET exam

How to Prepare for NEET

Read our guide to prepare for NEET which is created by Toppers & the best Teachers
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Download the FREE EduRev App
Track your progress, build streaks, highlight & save important lessons and more!
Related Searches

video lectures

,

Objective type Questions

,

Introduction to DNA & RNA Video Lecture | Biology Class 12 - NEET

,

Extra Questions

,

pdf

,

MCQs

,

Exam

,

practice quizzes

,

Sample Paper

,

shortcuts and tricks

,

Introduction to DNA & RNA Video Lecture | Biology Class 12 - NEET

,

Introduction to DNA & RNA Video Lecture | Biology Class 12 - NEET

,

Semester Notes

,

mock tests for examination

,

Previous Year Questions with Solutions

,

past year papers

,

Important questions

,

Summary

,

Free

,

Viva Questions

,

study material

,

ppt

;