InstaQB

Home
Institutions
- Institutions
  
  Polytechnic Colleges
  
  Medical Colleges
  
  Arts & Science Colleges
  
  Universities
  
  Engineering Colleges
  
  Agricultural Colleges
  
  Research Institute
  
  Law Colleges
  
  Audiology and Speech Colleges
  
  Business & Management colleges
  
  Nursing colleges
  
  Hotel Management institutes
  
  Aeronautical Colleges
  
  Bachelor's Degree
Syllabus
Courses
Stateboard
- 12th Standard English Medium
  
  Maths
  
  Physics
  
  Chemistry
  
  Biology
  
  Computer Science
  
  Business Maths
  
  Economics
  
  Commerce
  
  Accountancy
  
  History
  
  Computer Applications
  
  Computer Technology
  12th Standard Tamil Medium
  
  உயிரியல்
  
  கணினி பயன்பாடுகள்
  
  கணினி அறிவியல்
  
  வணிகக் கணிதம்
  
  வணிகவியல்
  
  பொருளியல்
  
  கணிதவியல்
  
  வேதியியல்
  
  இயற்பியல்
  
  கணினி தொழில்நுட்பம்
  
  வரலாறு
  
  கணக்குப்பதிவியல்
  11th Standard English Medium
  
  Maths
  
  Commerce
  
  Economics
  
  Biology
  
  Business Maths
  
  Accountancy
  
  Computer Science
  
  Physics
  
  Chemistry
  
  Computer Applications
  
  History
  
  Computer Technology
  
  Bio - Zoology
  11th Standard Tamil Medium
  
  கணிதவியல்
  
  உயிரியல்
  
  பொருளியல்
  
  இயற்பியல்
  
  வேதியியல்
  
  வணிகக் கணிதம்
  
  கணினி அறிவியல்
  
  கணக்குப்பதிவியல்
  
  வணிகவியல்
  
  கணினி பயன்பாடுகள்
  10th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  9th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  
  8th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
  7th Standard English Medium
  
  Mathematics
  
  Science
  
  Social Science
ICSE/ISC
- Class XII
  
  Mathematics
  
  Physics
  
  Accountancy
  
  Biology
  
  History
  
  Geography
  
  Psychology
  
  chemistry
  
  Economics
  
  Computer Science
  
  Political Science
  
  Business Studies
  Class XI
  
  Accountancy
  
  Chemistry
  
  Mathematics
  
  Biology
  
  Geography
  
  Physics
  
  History
CBSE
- 12Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Geography
  
  Socialogy
  
  Business Studies
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  
  Home Science
  11Th Standard
  
  Physics
  
  Chemistry
  
  Maths
  
  Biology
  
  History
  
  Economics
  
  Commerce
  
  Socialogy
  
  Business Studies
  
  Geography
  
  Home Science
  
  Computer Science
  
  Biotechnology Class
  
  Political Science
  10Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  Mathematics
  
  Economics
  
  Geography
  
  History & Civics
  
  Computer Application
  9Th Standard
  
  Physics
  
  Chemistry
  
  Biology
  
  mathematics
  
  Computer Application
  
  Economics
  
  Geography
  
  History & Civics

12th Biology Weekly Test -1 ( Zoology - Molecular Genetics )

St. Britto Hr. Sec. School - Madurai

12th Biology Weekly Test -1 ( Zoology - Molecular Genetics )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The codon _________ codes for phenylalanine

UAA
UUU
UCU
UAC

_______demonstrated that RNA is the genetic material in RNA containing viruses.

Avery
Conrat and Singer
Griffith
Watson and Crick

Messelson and Stahl ___________.

proved that RNA is the genetic material
proved that protein synthesis is dependent on DNA
proved the semi conservative mode of DNA replication
discovered enzymes involved in replication

Chromosomes were first observed by_______ .

Miescher
Hofmeister
Avery
Griffith

DNA fmger printing technique was developed by

Frederick Sanger
Alex Jeffrey
Hershey
Rosalind Franklin

In human beings chromosome ___________ has one height gene density.

18
20
19
22

The concept of RNA world was independently proposed by __________

Orgel, Brick and Carl woese
Brick, Griffith and Crick
Wilkins and Franklin
Walter Gilbert

The term gene was coined by________

Mendel
Lyon
Johannsen
Hershey

When lactose is present in the culture medium:

Transcription of lac y, lac z, lac a genes occurs.
Repressor is unable to bind to the operator.
Repressor is able to bind to the operator.
Both (a) and (b) are correct.

___________ used radioactive labelled molecules to prove that DNA is the genetic material.

Hershey and Chase
Wilkins and Franklin
Griffith
Mcleod and Avery

Part - B

Generic 2 - Answer All Question

What is a nucleosome?

Differentiate - Template strand and coding strand.
Differentiate - Leading stand and lagging strand

State any three goals of the human genome project.

What is genophore?

Give reasons: Genetic code is ‘universal’.

Part - C

Generic 3 - Answer All Question

What is a genetic code?

What are okazaki fragments?
Define a operon.

What is S-D Sequence?

From their examination of the structure of DNA, What did Watson and Crick infer about the probable mechanism of DNA replication, coding capability and mutation?

A low level of expression of lac operon occurs at all the windows for treatment of various genetic disorders. Justify the statement

Part - D

Generic 5 - Answer All Question

Explain the formation of a nucleosome.

How is the two stage process of protein synthesis advantageous?

It is established that RNA is the first genetic material. Justify giving reasons.
Why did Hershey and Chase use radioactively labelled phosphorous and sulphur only? Would they have got the same result if they use radiolabelled carbon and nitrogen?

Comment

Add Comment

Tamilnadu Stateboardszs - Class