- AOnly individual 3
- B1 and 2
- C1 and 3
- D2 and 3
Question types
MODEL PAPER 9 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 9 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Crop rotation is used by farmers to increase:
- ASoil fertility
- BNitrogenous content of soil
- CBreeding
- DOrganic content of soil
Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character
- AThe trait under study could not be colour blindness
- BThe female parent is heterozygous
- CThe male parent is homozygous dominant
- DThe parent could not have had a normal daughter for this character
Flow of energy in our ecosystem takes place
- Aonly in one direction
- Bpossible in two directions
- Cin three dimensions
- Dmay occur in multiple directions
What was the resultant found in the place marked E?
- AGlucose, fatty acids and lipids
- BSome fatty acids and organic acids
- CSome amino acids as glycine and alanine
- DOrganic esters only
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and curd
Biogas, Citric acid, Penicillin and curd
Name the microbes that help production of the following products commercially:
(a) Statin
(b) Citric acid
(c) Penicillin
(d) Butyric acid
(a) Statin
(b) Citric acid
(c) Penicillin
(d) Butyric acid
Name the labels A, B, C, D, E and F in the diagram of seminiferous tubule.
These pictures show the gynoecium of (A) Papaver and (B) Michelia flowers, Write the difference in the structure of their ovaries.
Read the sequence of the nucleotides in the given segment of mRNA and the respective amino acid sequence in the polypeptide chain.
Polypeptide: met-phe-met-proline-valine-serine
i. Provide the triplet of bases (codon) for
a. valine
b. proline
ii. Write the nucleotide sequence of the DNA strand from which this mRNA was transcribed
iii. What does the last codon of this RNA stand for?
Polypeptide: met-phe-met-proline-valine-serine
i. Provide the triplet of bases (codon) for
a. valine
b. proline
ii. Write the nucleotide sequence of the DNA strand from which this mRNA was transcribed
iii. What does the last codon of this RNA stand for?
Give three hypothesis for explaining why tropics show greatest levels of species richness.
Differentiate between vaccination and immunization. Describe the two types of vaccines with suitable examples?
What data support that the evolutionary history of man is like that of any other organism?
Briefly classify the extinction processes.
The below image shows is the headquarter of Eli Lilly company. Eli lily is one of the first pharmaceutical companies to produce human insulin using RDT technology by cell-based fermentation method.
i. How did Eli Lilly synthesize human insulin?
ii. Mention one difference between this insulin and the one produce by the human pancreas.
i. How did Eli Lilly synthesize human insulin?
ii. Mention one difference between this insulin and the one produce by the human pancreas.
Differentiate between:
a. hypocotyol and epicotyl
b. coleoptile and coleorrhiza
c. integument and testa
d. perisperm and pericarp
a. hypocotyol and epicotyl
b. coleoptile and coleorrhiza
c. integument and testa
d. perisperm and pericarp
Study the figure of vector pBR322 given below in which foreign DNA is ligated at the Bam HI site of tetracyline resistance gene.
Answer the following questions:
i. Mention the function of rop.
ii. What will be the selectable marker for this recombinant plasmid and why?
iii. Explain transformation.
Answer the following questions:
i. Mention the function of rop.
ii. What will be the selectable marker for this recombinant plasmid and why?
iii. Explain transformation.
Describe the structure of a ribosome, taking into consideration, its role in protein synthesis.
The melding of a technique for repeated rounds of DNA synthesis with the discovery of a thermostable DNA polymerase has given scientists the very powerful technique known as polymerase chain reaction (PCR). PCR is based on three simple steps required for any DNA synthesis reaction: (1) denaturation of the template into single strands; (2) annealing of primers to each original strand for new strand synthesis; and (3) extension of the new DNA strands from the primers.
In the given figure, one cycle of polymerase chain reaction (PCR) is shown:
i. Name the steps A, B and C.
ii. Give the purpose of each of these steps.
iii. State the contribution of Thermus aquaticus in this process.
In the given figure, one cycle of polymerase chain reaction (PCR) is shown:
i. Name the steps A, B and C.
ii. Give the purpose of each of these steps.
iii. State the contribution of Thermus aquaticus in this process.
Give an account of the methods used in sequencing the human genome.
Assertion $(A):$ The earliest organisms that appeared on the earth were non$-$green and presumably anaerobes.
Reason $(R):$ The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
Reason $(R):$ The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
- ✓Both $A$ 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 $A.$
- C$A$ is true but $R$ is false.
- D$A$ is false but $R$ is true.
Answer: A.
View full solution →Assertion (A): Epiphytes grow on other plants.
Reason (R): They grow only in humid areas.
Reason (R): They grow only in humid areas.
- 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 : The use of fertilizers greatly enhances crop productivity.
Reason : Irrigation is very important in increasing crop productivity.
Reason : Irrigation is very important in increasing crop productivity.
- AIf both Assertion & Reason are true but the reason is not the correct explanation of the assertion
- BIf both Assertion & Reason are true and the reason is the correct explanation of the assertion,
- CIf Assertion is true statement but Reason is false
- DIf both Assertion and Reason are false statements
Assertion (A): Ormeloxifene, also known as centchroman, is used as a nonsteroidal oral contraceptive.
Reason (R): It causes an asynchrony in the menstrual cycle between ovulation and the development of the uterine lining.
Reason (R): It causes an asynchrony in the menstrual cycle between ovulation and the development of the uterine lining.
- 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:
When a microorganism invades a host, a definite sequence of events usually occur leading to infection and disease, causing suffering to the host. This process is called pathogenesis. Once a microorganism overcomes the defense system of the host, development of the disease follows a certain sequence of events as shown in the graph. Study the graph given below for the sequence of events leading to appearance of a disease and answer the questions that follow:
i. In which period, according to the graph there are maximum chances of a person transmitting a disease/infection and why? (1)
ii. Study the graph and write what is an incubation period. Name a sexually transmitted disease that can be easily transmitted during this period. Name the specific type of lymphocytes that are attacked by the pathogen of this disease. (1)
iii. Draw a schematic labelled diagram of an antibody. (2)
OR
In which period, the number of immune cells forming antibodies will be the highest in a person suffering from pneumonia?
Name the immune cells that produce antibodies. (2)
When a microorganism invades a host, a definite sequence of events usually occur leading to infection and disease, causing suffering to the host. This process is called pathogenesis. Once a microorganism overcomes the defense system of the host, development of the disease follows a certain sequence of events as shown in the graph. Study the graph given below for the sequence of events leading to appearance of a disease and answer the questions that follow:
i. In which period, according to the graph there are maximum chances of a person transmitting a disease/infection and why? (1)
ii. Study the graph and write what is an incubation period. Name a sexually transmitted disease that can be easily transmitted during this period. Name the specific type of lymphocytes that are attacked by the pathogen of this disease. (1)
iii. Draw a schematic labelled diagram of an antibody. (2)
OR
In which period, the number of immune cells forming antibodies will be the highest in a person suffering from pneumonia?
Name the immune cells that produce antibodies. (2)
Read the following text carefully and answer the questions that follow:
i. Identify the hormones X and Y respectively. (1)
ii. Label W and Z. (1)
iii. Name the hormones produced only during pregnancy in human female. Mention their source organs. (2)
OR
Name any two hormones which are secreted by placenta and are also present in a non-pregnant woman. (2)
i. Identify the hormones X and Y respectively. (1)
ii. Label W and Z. (1)
iii. Name the hormones produced only during pregnancy in human female. Mention their source organs. (2)
OR
Name any two hormones which are secreted by placenta and are also present in a non-pregnant woman. (2)
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