CBSE 12 Biology Question Paper-2017 by Pavan | Practice Test to Test Your Knowledge
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CBSE 12 Biology Question Paper-2017

CBSE 12 Biology Question Paper-2017

This mock test includes actual CBSE Class 12 Biology board exam questions from the year 2017, helping students understand exam trends and practice real paper formats

2025-08-04
Pavan Pavan
CBSE Class 12 Biology 2017 Grade 12

Duration

50 min

Questions

50

Marking

Negative

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Questions Preview

What is 'fitness of an individual' according to Darwin?

A
The ability to survive and reproduce
B
The ability to migrate
C
The ability to grow
D
The ability to adapt to the environment

What is biopiracy?

A
The exploitation of biological resources without compensation
B
The study of new plant species
C
The genetic modification of organisms
D
The conservation of endangered species

Suggest a method to ensure an anamnestic response in humans.

A
Vaccination
B
Exercise
C
Meditation
D
Dietary changes

State the fate of a pair of autosomes during gamete formation.

A
They are separated into different gametes
B
They stay together in the same gamete
C
They fuse together to form a single chromosome
D
They do not undergo meiosis

Our government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.

A
To ensure the safety of women's health
B
To prevent overpopulation
C
To control genetic diversity
D
To limit the number of births

Explain this algebraic equation on the basis of Hardy Weinberg’s principle: p2 + 2pq + q2 = 1.

A
It represents the allele frequencies in a population
B
It explains the gene flow between populations
C
It shows the inheritance pattern of a trait
D
It describes the genetic variation in a single individual

During a medical investigation, an infant was found to possess an extra chromosome 21. Describe the symptoms the child is likely to develop later in life.

A
Down syndrome symptoms
B
Autism spectrum disorder symptoms
C
Cystic fibrosis symptoms
D
Fragile X syndrome symptoms

Explain the role(s) of the following in Biotechnology: (a) Restriction endonuclease, (b) Gel – electrophoresis, (c) Selectable markers in pBR322.

A
They are used for genetic manipulation
B
They help in cell division
C
They support the immune system
D
They are used for cloning

How does the application of cyanobacteria help improve agriculture output?

A
By fixing nitrogen in the soil
B
By increasing photosynthesis rates
C
By acting as a natural pesticide
D
By enriching soil with potassium

Describe the structure of a nucleosome.

A
A segment of DNA wrapped around histone proteins
B
A single strand of RNA
C
A double helix of DNA
D
A protein complex with no DNA

What is the process of bioluminescence in organisms?

A
The production and emission of light by living organisms
B
The process of cellular respiration
C
The absorption of light by chlorophyll
D
The transformation of energy in the form of heat

Explain the role of ATP in cellular functions.

A
ATP provides energy for cellular processes
B
ATP helps in protein synthesis
C
ATP transports ions across membranes
D
ATP repairs damaged DNA

What are stem cells and their role in the body?

A
Undifferentiated cells that can become specialized
B
Cells that are specialized for energy production
C
Cells that carry oxygen in the bloodstream
D
Cells that protect the body from infections

How does genetic engineering help in producing genetically modified organisms (GMOs)?

A
By introducing new genes into an organism’s DNA
B
By changing the organism’s environment
C
By selecting organisms with desired traits
D
By reproducing organisms in the laboratory

What is the function of ribosomes in a cell?

A
To synthesize proteins
B
To store genetic information
C
To generate energy
D
To package and transport cellular materials

What is the primary function of red blood cells?

A
To transport oxygen throughout the body
B
To store glucose
C
To produce white blood cells
D
To synthesize proteins

What is the function of the endocrine system?

A
To regulate body processes through hormones
B
To store and release energy
C
To produce red blood cells
D
To defend the body against pathogens

What are the major components of the lymphatic system?

A
Lymph nodes, lymph vessels, and the spleen
B
Heart, lungs, and blood vessels
C
Kidneys, bladder, and ureters
D
Bones, marrow, and joints

What is the function of the digestive system?

A
To break down food and absorb nutrients
B
To transport oxygen throughout the body
C
To defend the body against pathogens
D
To regulate hormone levels

What are the components of the nervous system?

A
Brain, spinal cord, and nerves
B
Lungs, heart, and blood vessels
C
Muscles, joints, and bones
D
Kidneys, bladder, and ureters

What is the function of the integumentary system?

A
To protect the body from physical damage and infection
B
To regulate blood pressure
C
To produce white blood cells
D
To store glucose

What is the function of the excretory system?

A
To remove waste products from the body
B
To produce hormones
C
To synthesize proteins
D
To store nutrients

What is the role of the lymphatic system?

A
To defend the body against infection and return tissue fluids to the bloodstream
B
To store glucose
C
To produce red blood cells
D
To store and release energy

What is the function of the prostate gland?

A
To produce seminal fluid
B
To produce eggs
C
To regulate body temperature
D
To produce insulin

What is the function of the adrenal glands?

A
To produce hormones like adrenaline and cortisol
B
To regulate blood sugar
C
To store energy
D
To produce red blood cells

What is the function of the pituitary gland?

A
To secrete hormones that regulate other glands
B
To produce red blood cells
C
To regulate body temperature
D
To control the immune system

What is the primary function of the hypothalamus?

A
To control hunger, thirst, and body temperature
B
To regulate the immune system
C
To produce red blood cells
D
To regulate heartbeat

What is the process of transcription in molecular biology?

A
The process of making RNA from a DNA template
B
The process of protein synthesis
C
The process of DNA replication
D
The process of cell division

What is the process of translation in molecular biology?

A
The process of synthesizing a protein from RNA
B
The process of making RNA from a DNA template
C
The process of DNA replication
D
The process of cell division

What is the primary function of the mitochondria?

A
To generate ATP, the cell's energy currency
B
To store genetic material
C
To synthesize proteins
D
To store and release calcium ions

How does the immune system protect the body from pathogens?

A
By recognizing and attacking foreign invaders
B
By producing red blood cells
C
By repairing damaged tissues
D
By providing energy to the cells

What is the function of the Golgi apparatus in a cell?

A
To modify, package, and distribute proteins
B
To synthesize proteins
C
To store energy in the form of glucose
D
To store and release calcium ions

What is the primary function of the cell membrane?

A
To protect the cell and control what enters and exits
B
To synthesize proteins
C
To generate ATP
D
To store genetic material

What role does the spleen play in the immune system?

A
It filters the blood and removes old or damaged red blood cells
B
It produces white blood cells
C
It stores calcium for bone health
D
It stores glucose

How does the circulatory system support homeostasis?

A
By transporting nutrients, oxygen, and hormones throughout the body
B
By producing white blood cells
C
By synthesizing proteins
D
By storing energy

What is the primary function of red blood cells?

A
To transport oxygen throughout the body
B
To store glucose
C
To produce white blood cells
D
To synthesize proteins

What is the function of the endocrine system?

A
To regulate body processes through hormones
B
To store and release energy
C
To produce red blood cells
D
To defend the body against pathogens

What are the major components of the lymphatic system?

A
Lymph nodes, lymph vessels, and the spleen
B
Heart, lungs, and blood vessels
C
Kidneys, bladder, and ureters
D
Bones, marrow, and joints

What is the function of the respiratory system?

A
To regulate oxygen and carbon dioxide levels in the blood
B
To synthesize proteins
C
To store glucose
D
To produce red blood cells

What is the primary role of the digestive system?

A
To break down food and absorb nutrients
B
To transport oxygen throughout the body
C
To defend the body against pathogens
D
To regulate hormone levels

What are the components of the nervous system?

A
Brain, spinal cord, and nerves
B
Lungs, heart, and blood vessels
C
Muscles, joints, and bones
D
Kidneys, bladder, and ureters

What is the function of the integumentary system?

A
To protect the body from physical damage and infection
B
To regulate blood pressure
C
To produce white blood cells
D
To store glucose

How does the body maintain fluid balance?

A
By regulating water intake and output through the kidneys
B
By producing more red blood cells
C
By increasing metabolic rate
D
By storing excess fluid in the muscles

What is the primary function of the excretory system?

A
To remove waste products from the body
B
To produce hormones
C
To synthesize proteins
D
To store nutrients

What is the role of the lymphatic system?

A
To defend the body against infection and return tissue fluids to the bloodstream
B
To store glucose
C
To produce red blood cells
D
To store and release energy

What is the function of the prostate gland?

A
To produce seminal fluid
B
To produce eggs
C
To regulate body temperature
D
To produce insulin

What is the function of the adrenal glands?

A
To produce hormones like adrenaline and cortisol
B
To regulate blood sugar
C
To store energy
D
To produce red blood cells

What is the function of the pituitary gland?

A
To secrete hormones that regulate other glands
B
To produce red blood cells
C
To regulate body temperature
D
To control the immune system

What is the primary function of the hypothalamus?

A
To control hunger, thirst, and body temperature
B
To regulate the immune system
C
To produce red blood cells
D
To regulate heartbeat

What is the process of transcription in molecular biology?

A
The process of making RNA from a DNA template
B
The process of protein synthesis
C
The process of DNA replication
D
The process of cell division