Tamil Nadu Board 12th Standard Bio-Zoology - Chapter 9: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 9 – Bio-Zoology from the Tamil Nadu State Board 12th Standard Bio-Zoology textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.
We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.
By going through this material, you’ll gain a strong understanding of Bio-Zoology Chapter 9 along with the corresponding book back questions and answers (PDF format).
Question Types Covered:
- 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following
- 2 Mark Questions: Answer briefly
- 3, 4, and 5 Mark Questions: Answer in detail
All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.
All the best, Class 12 students! Prepare well and aim for top scores. Thank you!
Chapter 9: Applications of Biotechnology
I. Multiple Choice Questions
a) AIDS
b) Cancer
c) Cystic fibrosis
d) SCID
Answer Key:
d) SCID
2. Dolly, the sheep was obtained by a technique known as
a) Cloning by gene transfer
b) Cloning without the help of gametes
c) Cloning by tissue culture of somatic cells
d) Cloning by nuclear transfer
Answer Key:
d) Cloning by nuclear transfer
3. The genetic defect adenosine deaminase deficiency may be cured permanently by
a) Enzyme replacement therapy
b) Periodic infusion of genetically engineered lymphocytes having ADA cDNA
c) Administering adenosine deaminase activators
d) Introducing bone marrow cells producing ADA into embryo at an early stage of development
Answer Key:
d) Introducing bone marrow cells producing ADA into embryo at an early stage of development
4. How many amino acids are arranged in the two chains of Insulin?
a) Chain A has 12 and Chain B has 13 amino acids
b) Chain A has 21 and Chain B has 30 amino acids
c) Chain A has 20 and chain B has 30 amino acids
d) Chain A has 12 and chain B has 20 amino acids.
b) Chain A has 21 and Chain B has 30 amino acids
Answer Key:
b) Chain A has 21 and Chain B has 30 amino acids
5. PCR proceeds in three distinct steps governed by temperature, they are in order of
a) Denaturation, Annealing, Synthesis
b) Synthesis, Annealing, Denaturation
c) Annealing, Synthesis, Denaturation
d) Denaturation, Synthesis, Annealing
Answer Key:
a) Denaturation, Annealing, Synthesis
6. Which one of the following statements is true regarding DNA polymerase used in PCR?
a) It is used to ligate introduced DNA in recipient cells
b) It serves as a selectable marker
c) It is isolated from a Virus
d) It remains active at a high temperature
Answer Key:
d) It remains active at a high temperature
7. ELISA is mainly used for
a) Detection of mutations
b) Detection of pathogens
c) Selecting animals having desired traits
d) Selecting plants having desired traits
Answer Key:
b) Detection of pathogens
8. Transgenic animals are those which have
a) Foreign DNA in some of their cells
b) Foreign DNA in all their cells
c) Foreign RNA in some of their cells
d) Foreign RNA in all their cells
Answer Key:
b) Foreign DNA in all their cells
9. Vaccines that use components of a pathogenic organism rather than the whole organism are called
a) Subunit recombinant vaccines
b) attenuated recombinant vaccines
c) DNA vaccines
d) conventional vaccines
Answer Key:
a) Subunit recombinant vaccines
II. Short answer questions
12th bio zoolgy III. Long answer questions
12th bio zology
0 Comments:
Post a Comment