12th Standard Syllabus & Materials
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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 12 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
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.
2.
An operon is a: ______.
Protein that suppresses gene expression
Protein that accelerates gene expression
Cluster of structural genes with related function
Gene that switched other genes on or off
3.
4.
5.
Which of the following statements is not true about DNA replication in eukaryotes?
Replication begins at a single origin of replication.
Replication is bidirectional from the origins.
Replication occurs at about 1 million base pairs per minute
There are numerous different bacterial chromosomes, with replication occuring in each at the same time.
1.
(d)
Both (a) and (b) are correct.
2.
(c)
Cluster of structural genes with related function
3.
(d)
4.
(c)
5.
(d)
There are numerous different bacterial chromosomes, with replication occuring in each at the same time.
12th Standard Syllabus & Materials
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
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