Which of the following is true for a Plasmid -
- AIt can be replicate independently
- BIt cannot replicate
- CIt lies together with chromosomes
- DIt shows independent assortment
Question types
MODEL PAPER 3 question types
38 questions across 6 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.
38
Questions
6
Question groups
5
Question types
01
M.C.Q (1 Marks)
12 Q→022 Marks Questions
6 Q→033 Marks Question
8 Q→045 Marks Questions
6 Q→05Assertion (A) & Reason (B) MCQ
4 Q→06Case study (4 Marks)
2 Q→Sample Questions
MODEL PAPER 3 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
$ \text{DNA} $ replication takes place during:
- ✓$S-$phase
- B$G_1$ phase
- C$G_2$ phase
- DProphase
Answer: A.
View full solution →Inthe given pedigree the shaded figures denote individuals expressing a specific trait:
Which of the following is the most probable mode of inheritance of this trait?
Which of the following is the most probable mode of inheritance of this trait?
- AX-linked recessive transmission
- BSimple Mendelian Recessive
- CCodominant relationship of a single pair of alleles
- DX-linked dominant transmission
Tapetum in pollen grains help in:
- AProvide nourishment to the young microspore mother cell
- BHelp in pollen grain germination
- CProvide protection to the microspore mother cell
- DHelp in the dispersal of pollen grain
- AA - translation B - transcription C - Erevin Chargaff
- BA-translation B - extension C - Rosalind Franklin
- CA - transcription B - translation C - Francis Crick
- DA - transcription B - replication C - James Watson
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
i. Bacteria
ii. Banyan
iii. Deer
iv. Fish
i. Bacteria
ii. Banyan
iii. Deer
iv. Fish
Why cannot a population live alone by itself in nature?
Name the labels A, B, C, D, E and F in the diagram of seminiferous tubule.
(A) bacterial cell is shown in the figure given below. Label the part (A) and (B). Also mention the use of part 'A' in rDNA technology.
In the pie chart (a) and (b) drawn below to show the global animal diversity, which group of animals would you name and write on the areas shaded back in (a) and (b). In which kind of habitat would you find these groups of animals?
Draw the diagram of a microsporangium and label its wall layers. Write briefly on the role of the endothecium.
Why is Saheli considered an effective contraceptive for women to space children?
i. Name an ideal pyramid existing in an ecosystem. Construct it up to its three trophic levels along with their
names.
ii. The sun provides 1,000,000 J of sunlight (solar energy) to an ecosystem. Write the amount of energy that is available to the first and third trophic levels, respectively.
names.
ii. The sun provides 1,000,000 J of sunlight (solar energy) to an ecosystem. Write the amount of energy that is available to the first and third trophic levels, respectively.
i. Why is tender coconut considered as a healthy source of nutrition?
ii. How are pea seeds different from castor seeds with respect to endosperm?
ii. How are pea seeds different from castor seeds with respect to endosperm?
The graph given below shows species-area relationship of a certain region.
a. Study the graph and explain what it represents.
b. After a while, a small area was taken for constructing a road which divided the region into two. Write the impact this construction would have on species richness of the region.
a. Study the graph and explain what it represents.
b. After a while, a small area was taken for constructing a road which divided the region into two. Write the impact this construction would have on species richness of the region.
What is the Pulse Polio Programme of Government of India? What is OPV? Why is it that India is yet to eradicate Polio?
A patient is suffering from ADA deficiency. Can the patient be cured? How?
Describe the various evidences from palaeontology which support organic evolution.
i. What is the chemical name of smack? Why is the consumption of smack considered as an abuse?
ii. Name the source plant and one effect of the following drugs on the human body:
1. Marijuana
2. Cocaine
3. Morphine
ii. Name the source plant and one effect of the following drugs on the human body:
1. Marijuana
2. Cocaine
3. Morphine
What are the various advantages of using genetically modified plants to increase the overall yield of the crop?
Assertion (A): Escherichia coli, Shigella sp., and Salmonella sp. are all responsible for diarrhoeal diseases.
Reason (R): Dehydration is common to all types of diarrhoeal diseases and an adequate supply of fluids and electrolytes should be ensured.
Reason (R): Dehydration is common to all types of diarrhoeal diseases and an adequate supply of fluids and electrolytes should be ensured.
- AAssertion and reason both are correct statements and reason is correct explanation for assertion.
- BAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Assertion (A): DNA fingerprinting is a very quick way to distinguish any two individuals.
Reason (R): Any two individuals in the world except identical twins have not similar VNTR.
Reason (R): Any two individuals in the world except identical twins have not similar VNTR.
- AAssertion and reason both are correct statements and reason is correct explanation for assertion.
- BAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Assertion (A): Appetency is the formation of new structural or habit of the organism according to its need.
Reason (R): It is also called Lamarckian doctrine.
Reason (R): It is also called Lamarckian doctrine.
- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Assertion (A): Siblings are monoparental in origin.
Reason (R): Monoparental progenies are exact copies of the parent.
Reason (R): Monoparental progenies are exact copies of the parent.
- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Read the following text carefully and answer the questions that follow:
Transgenic animals can serve as factories that in some cases, may produce large amounts of proteins more efficiently. Transgenic mice have been engineered to express human antibodies by introducing a large segment of human DNA encoding human immunoglobulin genes. In transgenic large animals such as cows or sheep proteins of pharmaceutical value can be produced in large quantities in milk which is later purified. Transgenes can be used to alter many phenotypic properties including growth rate, fat composition, milk production, hair texture, etc.
i. In transgenic animals, i.e. cow and sheep proteins of pharmaceutical value are produced in large quantities in which gland. (1)
ii. Why is mouse the most preferred animal for studies on gene transfer? (1)
iii. Why does the production of transgenic animals take place? (2)
OR
Assertion (A): Transgenic mice have been engineered to express human antibodies. (2)
Reason (R): Large segments of human DNA encoding human immunoglobulin have been transferred to mice.
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false but R is true.
Transgenic animals can serve as factories that in some cases, may produce large amounts of proteins more efficiently. Transgenic mice have been engineered to express human antibodies by introducing a large segment of human DNA encoding human immunoglobulin genes. In transgenic large animals such as cows or sheep proteins of pharmaceutical value can be produced in large quantities in milk which is later purified. Transgenes can be used to alter many phenotypic properties including growth rate, fat composition, milk production, hair texture, etc.
i. In transgenic animals, i.e. cow and sheep proteins of pharmaceutical value are produced in large quantities in which gland. (1)
ii. Why is mouse the most preferred animal for studies on gene transfer? (1)
iii. Why does the production of transgenic animals take place? (2)
OR
Assertion (A): Transgenic mice have been engineered to express human antibodies. (2)
Reason (R): Large segments of human DNA encoding human immunoglobulin have been transferred to mice.
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false but R is true.
Read the following text carefully and answer the questions that follow:
Gene regulation is the mechanism of switching off and switching on of the genes depending upon the requirement of cells and the state of development. Gene regulation is of two types: negative and positive. In negative gene regulation, the genes continue expressing their effect till their activity is suppressed. Positive gene regulation is the one in which the genes remain non-expressed unless and until they are induced to do it. Operon model is a co-ordinated group of genes such as structural gene, operator gene, promoter gene, regulator gene which function together and regulate a metabolic pathway as a unit, e.g., lac operon, trp operon, ara operon, etc.
i. Regulation of gene expression occurs at which the level? (1)
ii. What is complementary to an mRNA molecule transcribed from the lac operon contains nucleotide sequences? (1)
iii. Describes the control of transcription of the genes involved in the breakdown of lactose in Escherichia coli?
(2)
OR
What is the function of catabolic activator protein in lac operon? (2)
Gene regulation is the mechanism of switching off and switching on of the genes depending upon the requirement of cells and the state of development. Gene regulation is of two types: negative and positive. In negative gene regulation, the genes continue expressing their effect till their activity is suppressed. Positive gene regulation is the one in which the genes remain non-expressed unless and until they are induced to do it. Operon model is a co-ordinated group of genes such as structural gene, operator gene, promoter gene, regulator gene which function together and regulate a metabolic pathway as a unit, e.g., lac operon, trp operon, ara operon, etc.
i. Regulation of gene expression occurs at which the level? (1)
ii. What is complementary to an mRNA molecule transcribed from the lac operon contains nucleotide sequences? (1)
iii. Describes the control of transcription of the genes involved in the breakdown of lactose in Escherichia coli?
(2)
OR
What is the function of catabolic activator protein in lac operon? (2)
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