DNA fragments move at different distances in Gel Electrophoresis because:
- AThe voltage is too high.
- BMolecular weights of the fragments are different.
- CDNA has a positive charge.
- DDNA gets denatured.
Question types
MODEL PAPER 2 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 2 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
The excreta of cattle, commonly called gobar is rich in _____________ .
- ABacillus species
- BRhizobium
- CPseudomonas putida
- DMethanobacterium
Represented below is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern?
- AThalassemia
- BHaemophilia
- CSickle Cell anemia
- DPhenyl ketonuria
Biological equilibrium is an equilibrium among the:
- AProducers and consumers
- BProducers and decomposers
- CProducers
- DProducers, consumers and decomposers
The diagram represents miller's experiment. Choose the correct combination of labelling.
- A$A-$electrodes, $B-NH3 + H2O, C-$hot water, $D-$tap, $E-U$ trap
- B$A-$electrodes, $B-NH_4+ H_2 + CO_2 +CH_3, C-$ hot water, $D-$vacuum, $E-U$ trap
- ✓$A-$electrodes, $B-NH_3+ H_2 + H_2O +CH_2, C-$ cold water, $D-$vacuum, $E-U$ trap
- D$A-$electrodes, $B-NH_3 + H_2+ H_2O +CH_4, C-$ steam, $D-$vacuum, $E-U$ trap
Answer: C.
View full solution →Name the effective biocontrol agents of several plant pathogens belonging to group of viruses. Also write about the ways they support the environment.
State the most important contribution of the following microbes for human welfare:
a. monascus purpureus
b. Trichoderma Polysporum
a. monascus purpureus
b. Trichoderma Polysporum
Identify A, B, C and D with reference to gametogenesis in humans, in the flow chart given below.
a. Draw an L.S. of pistil showing pollen tube entering into the embryo sac. Label the following:
i. Nucellus
ii. Antipodals
iii. Synergids
iv. Micropyle
b. Write the functions of the following:
i. Synergids
ii. Micropyle
i. Nucellus
ii. Antipodals
iii. Synergids
iv. Micropyle
b. Write the functions of the following:
i. Synergids
ii. Micropyle
Study the given portion of double-stranded polynucleotide chain carefully. Identify a, b, c and the 5' end of the chain.
Alien species are a threat to native species. Justify taking examples of an animal and a plant alien species.
A patient complains of suffering from constipation, stomach ache, stool with blood clots and excess mucous.
The physician diagnosed it as amoebiasis, after stool test.
a. Write the scientific name of the microbe identified in the stool sample.
b. How do you think, the patient must have contracted it?
c. Write your suggestions to the patient to avoid infection in future.
The physician diagnosed it as amoebiasis, after stool test.
a. Write the scientific name of the microbe identified in the stool sample.
b. How do you think, the patient must have contracted it?
c. Write your suggestions to the patient to avoid infection in future.
Classify the following as examples of homology and analogy:
| (i) | Mouth parts of cockroach and butterfly |
| (ii) | Hearts of rabbits and human beings |
| (iii) | Eyes of octopus and mammals |
| (iv) | Sweet potato and potato |
| (v) | Stings of honey bee and scorpion |
| (vi) | Tendrils of Lathyrus and tendrils of Gloriosa |
Study the graphical representation of Species richness - Area relationship given below and answer the questions that follow:
a. What do S, C, Z and A represent in the given graph?
b. What will be the range value of Z line if we analyse the species-area relationship among very large areas like entire continent?
a. What do S, C, Z and A represent in the given graph?
b. What will be the range value of Z line if we analyse the species-area relationship among very large areas like entire continent?
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.
How and why is the bacterium Thermus aquaticus employed in recombinant DNA technology? Explain.
In 1952, Alfred Hershey and Martha Chase took an effort to find the genetic material in organisms. Their experiments led to an unequivocal proof to DNA as genetic material.
Answer the following questions based on Hershey and Chases's experiments:
i. Name the kind of virus they worked with and why?
ii. Why did they use two types of culture media to grow viruses in? Explain.
iii. What was the need for using a blender and later a centrifuge during their experiments? OR
iv. State the conclusion drawn by them after the experiments.
Answer the following questions based on Hershey and Chases's experiments:
i. Name the kind of virus they worked with and why?
ii. Why did they use two types of culture media to grow viruses in? Explain.
iii. What was the need for using a blender and later a centrifuge during their experiments? OR
iv. State the conclusion drawn by them after the experiments.
a. Draw a diagram of a fully developed embryo sac of an angiosperm. Label its chalazal end and any other five parts within the embryo sac.
b. Why does the development of an endosperm precede that of the embryo in angiosperm?
c. Number of chromosomes in an onion plant cell is 16. Name the cells of the embryo sac having 16 and 24 chromosomes formed after fertilisation.
b. Why does the development of an endosperm precede that of the embryo in angiosperm?
c. Number of chromosomes in an onion plant cell is 16. Name the cells of the embryo sac having 16 and 24 chromosomes formed after fertilisation.
Polymerase chain reaction (PCR) is a laboratory technique used to amplify DNA sequences. The method involves using short DNA sequences called primers to select the portion of the genome to be amplified. The temperature of the sample is repeatedly raised and lowered to help a DNA replication enzyme copy the target DNA sequence. The technique can produce a billion copies of the target sequence in just a few hours.
i. List the three steps involved in Polymerase Chain Reaction (PCR).
ii. Name the source organism of Taq polymerase.
iii. Explain the specific role of this enzyme in PCR.
i. List the three steps involved in Polymerase Chain Reaction (PCR).
ii. Name the source organism of Taq polymerase.
iii. Explain the specific role of this enzyme in PCR.
i. Name the type of DNA that forms the basis of DNA fingerprinting and mention two features of this DNA.
ii. Write the steps carried out in the process of DNA fingerprinting technique, and mention its application.
ii. Write the steps carried out in the process of DNA fingerprinting technique, and mention its application.
Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.
- 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): No energy that is trapped in an organism remains in it forever.
Reason (R): The energy trapped by a producer/consumer is either passed to a consumer/secondary consumer or the organism dies.
Reason (R): The energy trapped by a producer/consumer is either passed to a consumer/secondary consumer or the organism dies.
- 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): Azolla is used as a biofertiliser in rice fields.
Reason (R): Azolla shows the presence of N2 - fixing bacteria in its leaf cavities.
Reason (R): Azolla shows the presence of N2 - fixing bacteria in its leaf cavities.
- 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): Determining the sex of an unborn child followed by MTP is an illegal practice.
Reason (R): Amniocentesis is a practice to test the presence of genetic disorders also.
Reason (R): Amniocentesis is a practice to test the presence of genetic disorders also.
- 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).
- 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:
The diagram shows the replication of the retrovirus in the host.
i. Fill in the missing data in boxes labelled 1 & 2. (1)
ii. Why is it named as retrovirus? (1)
iii. While the virus is being replicated and released, does the infected cell survive and why the virus infected cells prevent spreading of virus to healthy cells? (2)
OR
What is the effect of HIV infection on immune system? (2)
The diagram shows the replication of the retrovirus in the host.
i. Fill in the missing data in boxes labelled 1 & 2. (1)
ii. Why is it named as retrovirus? (1)
iii. While the virus is being replicated and released, does the infected cell survive and why the virus infected cells prevent spreading of virus to healthy cells? (2)
OR
What is the effect of HIV infection on immune system? (2)
Read the following text carefully and answer the questions that follow:
The following is the illustration of the sequence of ovarian events (A-I) in a humans female.
i. Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents. (1)
ii. Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event. (1)
iii. Explain the changes that occur in the uterus simultaneously in anticipation. (2)
OR
Write the differences between C and H. (2)
The following is the illustration of the sequence of ovarian events (A-I) in a humans female.
i. Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents. (1)
ii. Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event. (1)
iii. Explain the changes that occur in the uterus simultaneously in anticipation. (2)
OR
Write the differences between C and H. (2)
Generate a MODEL PAPER 2 paper free
Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.