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Biology 12 Past Paper 2024 | Notely

HomePast papersBiology 122024

All Biology 12 papers

Class 12 · Past paper

Biology 12 past paper 2024

48 published questions in this index. The full practice view lets you work through them and track your own attempts.

15 MCQs33 written questionsPractise this paper

Question index

1
Rapid melting of ice caps and glaciers is due to:
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1
Describe the structure of rib cage. Briefly explain the advantages of having some ribs that are not attached directly to sternum.
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2
Pressure filtration in kidney specifically occurs in:
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2
What is the function of nephron? How is the rate of blood filtration within the Bowman's capsule affected if blood pressure in the afferent arteriole is decreased?

This is a skimmable index, not a replacement for the study surface. Open the practice view to answer questions and use the linked study material.

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3

The lungs are covered by a doubled layer of thin membranous sacs called:

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3

People with type I diabetes do not produce any insulin. What effect would it have on cells and metabolism if left untreated?

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3

Explain Habituation, Conditioning, Latent learning and insight learning by giving examples from human behaviours.

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4

Identify and describe the three different processes involved in embryonic development.

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4

How is the information present in DNA used for the synthesis of RNA? Explain in detail. Also list down the post transcriptional modifications of mRNA.

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5

Which of the following neurotransmitters functions both as a neurotransmitter and a hormone?

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5

What are the two methods used for gene therapy? Explain the role of successful gene therapy for cystic fibrosis.

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6

After consuming banana, which hormone would be expected to increase in body?

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6

What are chromosomes and genes? How are they related?

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6

Why is the anterior lobe of the pituitary gland called the master gland? Enlist the hormones produced by the anterior lobe. Write down the functions of each hormone as well.

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7

Which of the following hormones would bind to receptors located on the inside of a cell?

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7

In Griffith's experiment, do you think the heat treatment that killed the bacteria also inactivated the bacterial DNA? Why or why not?

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7

Describe the transport of oxygen and carbon dioxide through blood in humans.

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8

Differentiate between convergent and divergent evolution on the basis of inheritance of homologous and analogous structure.

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8

Explain in detail the Sliding filament model of muscle contraction.

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9

Which of the following will be hemophilic?

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9

Why is nasal breathing generally considered superior to mouth breathing? Also write down the sequence of muscle contractions that take place during inhalation and exhalation.

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10

In humans sex determination depends upon the nature of:

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10

Compare Klinefelter syndrome with Turner's syndrome with reference to Karyotype, Cause and Symptoms.

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11

Which of the following shows evidences for evolution through molecular biology?

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11

FSH and LH get their names from events of the female reproductive cycle, but they also function in males. How are their functions similar in females and males?

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12

The cause of acid rain is:

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12

Briefly explain Darwin's theory of natural selection.

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13

The enzyme used to isolate gene from DNA is:

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13

Differentiate between: **A.** Ammonification and denitrification **B.** Xerarch and hydarch succession

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14

The agent which separates the two strands of DNA in PCR (polymerase chain reaction) is:

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14

Briefly explain Integrated disease management.

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15

Which of the following hormones is secreted if blastocyst is successfully implanted in the wall of uterus?

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15

Briefly describe the procedure for the construction of Genomic library.

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16

The construction of intricate web by spider is an example of:

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16

Compare and contrast the sympathetic and parasympathetic nervous systems.

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17

Phosphodiester bond is:

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17

Briefly describe the following terms: **A.** Genetic marker **B.** Genomics **C.** Genome maps

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18

Local anaesthesia blocks the opening of sodium channels in the nerve cells. How would this affect the transmission of pain impulses? Explain briefly.

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19

Why biomass present at one trophic level of an ecosystem decreases at higher trophic level? Explain briefly.

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20

How is it possible for a child to have a blood group O if the parents have blood group A and B?

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21

Write down any three applications of DNA analysis.

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22

What is meant by home gardening? List at least four benefits of home gardening.

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23

State Mendel's law of segregation. Make a cross between round seed and wrinkled seed pea plant.

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24

What are the three major steps in sequencing of DNA?

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25

What is epistasis? How is it different from dominance?

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26

Briefly explain characteristics of Growth, Distribution and Carrying capacity of a population.

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27

Briefly explain the role of vaccination as an effective method of preventing infectious diseases.

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28

A plant with yellow flower was crossed with a plant with red flowers. The $F_1$ progeny obtained had orange flowers. What is the inheritance pattern? Explain briefly.

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