Board Exams

Board Exams

Preparation of Biology at a Glance (HSC 2019)

PUBLISH DATE 3rd March 2019

Board Mater Stroke (HSC Science)

Biology

Preparation of Biology at a Glance

  • Prof. Neelam Kulkarni, M.Sc. B.Ed. DIT, ACIT

Hello Students,

I will be discussing some tips & tricks for revisions of Biology within 1-2 days before the examination. Biology consist of 19 chapters, from this year (Feb/March 2019) the question paper of the final examination will be of 70 marks & there are no separate divisions such as Botany & Zoology, the paper will be of Biology.

Question paper pattern for The Written Examination

Section

Question Number

Question type

Total Marks

A

[1 Mark each]

Q 1 to Q 4

 

Multiple type Question

(MCQs)

 

4

 

 

Q5 to Q8

 


Very Short Questions

(VAS)

 

 

4

B

[2 Marks each]

Q9 to Q18

Short Answer Questions (SA)

 

20

C

[3 Marks each]

Q19 to Q27

[One Internal Choice]

Short Answer Questions (SA)

 

27

D

[5 Marks each]

Q28 to Q30

[Internal Choices for all questions]

Long Answer Questions (SA)

 

15

Total Marks

70

We will consider questions types & their marks accordingly revision will be easy.

In Section A objectives questions are asked for 4 marks i.e. MCQ & Questions for 1 Mark each – answer in one sentence. If these questions are properly read & written students can get all 8 marks.

  • e.g. In vegetative reproduction yield can be increased by
  1. grafting b) cutting c) leaf propagation d) rooting

The correct answer is b) cutting

  • Why human urine is yellow in colour?
  1. The correct answer is- Because of pigment urochrome, human urine is yellow in colour.

[For each correct answer 1 Mark each]

In section B, there are 2 marks questions, total 10 questions. In this section various type of questions such as distinguish between, give significance/importance, sketch & label, give reasons can be asked.

e.g.: * Write any two vitamins with their microbial source

1. Vitamins B2Neurospora gosslpii  

2. Vitamin C – Aspargillus niger

[For each correct answer 1 Mark each]

* How ape ancestor is different from man?

Ape has prognathous face, slanting forehead, snout protruded with flat nose, large teeth, while man has orthognathus face, development of high forehead, skull dome-shaped, elevated nose, and chine is present.

[Any 4 correct points of differences- ½ marks each i.e. 2 marks]

In Section C, there are 9 questions carrying 3 marks each, the types of a questions asked can be of different types such as sketch & label, flow chart, genetical charts Mendel’s law, inheritance of haernophilia, colour blindness, spermatogenesis, oogenesis, wobble

hypothesis, palindrome, DNA finger printing etc.

Diagrams drawing is soul of biology paper. Appropriate diagrams i.e. scientific, correct drawing with proper & correct labels will give you full credit. If you have made practice to draw diagrams that will be asset if your answer paper. Perfect diagrams with correct labels is the point to please the examiner.

  • Sketch a label- V.S. of human eye, conducting system of human heart a typical flower, r-RNA (Diagrams)

Very important point to be remembered for diagrams, you have to follow only HSC board’s textbook & not any other reference books.

 

  • Write any 6(six) features of genetic code-
  1. It is always triplet e.g. AAA
  2. It is without punctuations marks
  3. It is non-ambiguous i.e. each codon will be specify a particular amino acid
  4. It is of degenerate type
  5. It shows polarity i.e. read in 5’-3’ directions
  6. It is universal
  7. It may show wobble hypothesis i.e. codon – anticodon pairing of 3rd base may be weak.

[Any 6 correct points – ½ mark each]

  • Application based questions can also be asked, where you have to think & write the corelation of you have studied & apply the scientific reason.

e.g. Question - IF farmers maintain optimum population of earthworms & soil bacteria in their farms then how the structure & organic matter dynamic will get affected in their farms? Write a note on pyramid of biomass.

Ans. – If farmers maintain optimum population of earthworms & soil bacteria, these organisms breakdown detritus into smaller practicles called fragmentation, it helps in losing the soil & increasing O2 level form atmosphere into soil, water soluble inorganic nutrients breakdown into the soil & get precipitated as salts called leaching this also adds to fertility of soil.

Bacterial enzymes degrade detritus into simple inorganic substance called catabolism.

Humification also takes place which is formation of humus, dark coloured compound the reservoir of nutrients. In this way the optimum population of earthworms & soil bacteria will maintain optimum level of nutrients.

[Proper explanation- 2marks & for proper explanation with diagram of pyramid of biomass – 1mark]

  • In section D there are three questions each of 5 marks, there is internal option for each question. For this section weightage assigned by Board for each chapter is very important.
  • Chapter numbers – 1, 6, 7,15,16,17 & 18 can be considered for 5 marks questions. Chapter Circulation i.e. chapter no. 15 carries 6 marks weightage i.e. maximum as compared to other chapters. So please give emphasis on circulation.
  • Que. With the help of labelled diagram, describe a standard normal ECG with different complex & waves in it.

Note: Please click the Diagram for enlarged view

 structure-of-nephron structure-of-typical-flower human-eye human-brain

Note: Please click the Diagram for enlarged view

 

 

For this question proper & correct ECG with labels of the segments - 2 Marks

  • Correct & proper explanations of each segment - 3 marks (1 mark each for P wave, QRS complex & T wave)
  • Proper Time management of writing the answers in very important. First write answer of the questions for which you are sure & confidant, as time passes you will recollect what you have studied throughout the year. Do not be hyper, keep your mind cool & ease.
  • Last 10 minutes spare for reading all the answers, if any point is left you can write it.
  • Underline important words with pen only which is used for writing answers.
  • Do not take stress, write the answer with stress free mind.

-Wish you all the Best-

-Score Maximum Marks-

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