Biology 2015-2016 HSC Science (General) 12th Standard Board Exam Question Paper Solution

Genotype of human blood group ‘O’ will be ______.

I^AI^A

I^AI^B

ii

I^Ai

‘Cry’ genes are present in ______.

Agrobacterium tumefaciens

Bacillus thuringiensis

Rhizobium species

Escherichia coli

‘Tropane’ is obtained from __________.

(A) Daucus carota

(B) Catharanthus roseus

(C) Datura stramoneum

(D) Mentha piperata

Which of the following vitamins is not fat soluble?

(A) Vitamin A

(B) Vitamin B

(C) Vitamin D

(D) Vitamin K

How many meiotic divisions are required to produce 200 seeds?

50 

100

200

250

Energy flow in ecosystem is_____

(A) reverse

(B) unidirectional

(C) bidirectional

(D) multidirectional

Endosperm of angiosperm is __________.

(A) haploid

(B) diploid

(C) triploid

(D) tetraploid

What is Bacteriophage?

What is emasculation?

What is VAM?

What is the role of decomposers in an ecosystem?

Name any two edible mushrooms.

What is ecological succession?

Sketch and label the ‘Ultrastructure of Mitochondrion’.

Name any two antibiotics with their microbial source.

Describe the formation of helobial endosperm

Give the hazardous effects of agrochemicals.

Explain incomplete dominance with suitable example

What are transgenic plants? Explain with any two examples

Explain micropropagation and somatic hybridization.

Name the parts of an angiosperm flower in which development of male and female gametophyte take place.

Give the central dogma of protein synthesis.

Explain the process of translation.

What is dark reaction in photosynthesis?

Describe C₃ Pathway.

Vermiform appendix is an example of __________ organ.

(A) vestigeal

(B) homologous

(C) sense

(D) analogous

In which of the following disorders number of chromosomes present is 47?
(A) Turner’s syndrome
(B) Cushing’s syndrome
(C) Acquired Immuno - Deficiency Syndrome
(D) Down’s syndrome

Human blood clotting factor VIII is used to treat __________.

(A) pituitary dwarfism

(B) diabetes mellitus

(C) haemophilliacs

(D) cystic fibrosis

A person suffering from diabetes insipidus shows __________.

hyperglycemia

hypoglycemia

polyuria

hypertension

Photoreceptor cells are present in __________.

(A) blind spot

(B) retina

(C) cochlea

(D) cornea

‘HAART’ is suggested for the treatment of __________

(A) malaria

(B) cancer

(C) AIDS

(D) high chloesterol level

For DNA fingerprinting radioactive probe obtained from __________ is used in India.

(A) Banded Krait

(B) King Cobra

(C) Viper

(D) Rat snake

Define the following term:

Commensalism

What is the common name of Apis mellifera?

Which growth hormone is used to enhance dairy productivity?

Define Linkage.

Name of two classes to which Archaeopteryx acts as connecting link.

Define the term natality.

Sketch and label the structure of Malpighian body.

Enlist any four sequential evolutionary names of human ancestors.

Give the importance/significance of transgenic animals.

Give the economic importance of lac.

Give the fate of mesoderm.

Explain the mechanism of sex determination in birds.

Enlist any two features of Acquired immunity.

Construct an age pyramid which reflects an expanding growth status of human population.

With the help of a neat and labelled diagram, describe reflex arc.

Explain the process of early cleavage till the formation of morula.

Describe five types of leucocytes, with the help of diagrams. Add a note on their functions.