B.Sc. V Semester Examination

CBS-Vs/5 (R&P)

27851

BOTANY

Course No.: UBOTE -501

Time Allowed- 2½ Hours                                                                                        Maximum Marks-80

 

Note: Attempt all the parts of the compulsory question 1 from Section A, all the five questions from Section B and any two questions from Section C. Draw neatly labeled diagrams wherever required. Marks for the questions are indicated in the paper.

SECTION-A

1. Write briefly (70-80 words) on each of the following. (5×3=15)

i) r-DNA.

ii) Telomere.

iii) t-RNA.

iv) Nullisomics and Monosomics.

v) Transitions and Transversions.

SECTION-B

(5×7=35)

2. Discuss the fluid-mosaic model of the plasma membrane and its functions in the living cell.

3. What is extra nuclear inheritance? Illustrate with reference to plastids.

4. Discuss the nucleosome model of the organization of eukaryotic genome.

5. What are aneuploids? Classify giving illustrative examples.

6. What are non-allelic interactions? Illustrate with the help of complementary factors.

SECTION-C

(2×15=30)

7. Elucidate the structure and function of endoplasmic reticulum with examples of cell types in which the system is well developed.

8. Why is meiosis called the reductional division? Elucidate through stages of meiosis-I.

9. Discuss the features of the genetic code. How does the code control primary structure of proteins.

10. Classify euploids. Discuss the role of allopolyploidy in the origin of wheat.

11. Elucidate the role of linkage and crossing in gene mapping with a hypothetical example.

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B.Sc. V - Semester Examination

CBS-Vs/5 (R&P) 27981

CHEMISTRY

Course No.: UCHTE - 501

Time Allowed-2½ Hours                                                                                   Maximum Marks-80

SECTION-A

Answer all questions.      (5×3=15)

1. What is isotopic substitution?

2 What is actinometry?

3. Write the chemical formula of sodium nitroprusside. Write its two chemical properties.

4. What is a hot band?

5. Complete the following reaction. Write two physical properties of B.

2K₂ MnO₄ +Cl₂→ A+B        (1+2)

SECTION - B

Answer all questions.          (5x7=35)

6. What are overtones? Give reasons for appearance of overtones in vibration spectroscopy? (2+5)

7. What is Lambert Beer's law? Explain molar absorption coefficient.        (5+2)

8. Draw molecular energy level diagram of ferrocene.

9. How second law of photochemistry is used to explain quantum yield?

10. Which metal is present in chlorophyll and how this metal is responsible for photo behavior of chlorophyll?

SECTION-C

Answer any two questions.       (2×15=30)

11.  a). Write a small note on magnetic susceptibility of diamagnetic substances.

      b) Explain Clausius - Mossotti equation.

12. Explain with three examples effective atomic number (EAN) rule in mononuclear carbonyls having metallic atom with even atomic number.

13. a) What is induced dipole moment?

      b) Write a small note on biological functions of the below mentioned elements in biological systems.

i) Na⁺

ii) Mg²⁺

iii) K⁺  

iv) Ca²⁺

14. a) Write a note on laws of photochemistry.

      b) Explain examples of low and high quantum yields.

15. Explain briefly the following

i) Ferromagnetism.

ii) Quenching.

iii) Optical activity.      (3´5)

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BS-IS/11
219705
ZOOLOGY – COURSE NO. Zoo-101

Time Allowed – 3 Hours                                                 Maximum Marks – 80

Section-1

Note: – Attempt all ten questions. Each question carries 2 marks and the answer should be in 20 words.

Section-2

Note: – Attempt one question from each unit. Each question carries 12 marks. Draw labelled diagram wherever necessary.

SECTION-1

1. Define Protozoa.

2. What are Spicules?

3. Explain Nephridium.

4. Define metagenesis.

5. Explain cercariae larvae.

6. What is clitellum?

7. Describe an osculum.

8. What are tube feet?

9. Explain pinocytosis.

10. What is polymorphism?

SECTION-2

Unit I

1. Describe the process of conjugation and its significance in Paramecium.

2. Give the distinctive characters of phylum Porifera. Classify it up to classes giving characters and examples of each class.

Unit II

3. Write notes on:

   (a) Histology of Metridium

   (b) Medusa of Obelia.

4. What is digenetic life cycle? Explain it with reference to life history of Fasciola hepatica.

Unit III

5. What is a nephridium? Name and describe the various types of nephridia found in earthworm.

6. Give an account of digestive system of Prawn.

Unit IV

7. Describe the respiratory organs of Pila and explain how they are adopted for its mode of life.

8. Explain in detail the water vascular system of star fish.

Unit V

9. Write notes on:

   (a) Concept of coelom

   (b) Pluteus larva.

10. Write an account of nutrition in Protozoa.

B.Sc. IV - Semester Degree Examination
CBS-IVS/5
214778
ZOOLOGY
Course No. : UZOTC-401

Time Allowed: 2½ Hours                                                                              Maximum Marks: 80

Note: Attempt all the questions from section A & B.

Section A comprises of 5 short answer type questions (70-80 words), each carrying 3 marks.

Section B comprises of 5 medium answer type questions (250-300 words), each carrying 7 marks.

Section C comprises of long answer type questions (500-600 words). Attempt 2 questions, each carrying 15 marks.

Draw labelled diagrams wherever necessary.

Section - A

Short answer type questions. All are compulsory. (5x3=15)

1. Define multiple alleles and lethal alleles.

2. Give a brief account on Translocations and its types.

3. Give an account on phylogeny of human.

4. What do you mean by Recombination frequency?

5. Define allopatric and sympatric speciation.

Section - B

Medium answer type questions. All are compulsory. (5x7=35)

6. What is incomplete and Co-dominance, explain in detail.

7. Discuss in detail the complete and incomplete linkage.

8. Write a detail account on Gene mutations.

9. Describe the concept and Evidence of evolution.

10. What is Isolating mechanism, explain its examples.

Section - C

Long answer type questions. Attempt any two. (2x15=30)

11. Discuss in detail the principal and laws of inheritance with suitable crosses.

12. Give the detailed account on Crossing over. Add a note on Recombination frequency.

13. Describe various numerical chromosomal changes.

14. Give a detail account on:

a) Neo - Darwinism

b) Mass extinctions

15. Write an account of

a) Hardy Weinberg equilibrium

b) Mutation pressure.

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