CBSE-CLASS-XII SERIES Biology
Assisted Reproductive Technology
30 previous year questions.
Volume: 30 Ques
Yield: High
High-Yield Trend
30
2024 Chapter Questions 30 MCQs
01
PYQ 2024
medium
biology ID: cbse-cla
In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age. Study the graph given below regarding the menstrual cycle and answer the questions that follow:
\begin{figure}[H] % The [H] forces the figure to appear exactly here \centering \includegraphics[width=\textwidth]{Screenshot 2025-01-16 174432.png} % Replace with the actual path to your image \caption{Hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} (a) Name the hormones and their source organ, which are responsible for the menstrual cycle at puberty.
\begin{figure}[H] % The [H] forces the figure to appear exactly here \centering \includegraphics[width=\textwidth]{Screenshot 2025-01-16 174432.png} % Replace with the actual path to your image \caption{Hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} (a) Name the hormones and their source organ, which are responsible for the menstrual cycle at puberty.
02
PYQ 2024
medium
biology ID: cbse-cla
Populations evolve to maximise their reproductive fitness in the habitat in which they live. Study the population growth curves shown in the given graph and answer the questions that follow: \begin{figure}[h!] \centering \includegraphics[width=0.5\linewidth]{image.png} % Replace with the correct path to your image \caption{Population Growth Curves} \label{fig:populationgrowth}
\end{figure} (a) Identify the growth curves \u2018A\u2019 and \u2018B\u2019.
03
PYQ 2024
medium
biology ID: cbse-cla
(b) State the role of “biolistic gun” in biotechnology experiments.
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04
PYQ 2024
medium
biology ID: cbse-cla
(a) Why must a cell be made ‘competent’ in biotechnology experiments? How does calcium ion help in doing so?
[0.5cm]
[0.5cm]
05
PYQ 2024
medium
biology ID: cbse-cla
Study the following diagram of Transverse Section of a young anther of an angiosperm:
\textit{(Refer to the provided diagram)}
Select the option where parts ‘A’, ‘B’, and ‘C’ are correctly identified.
\textit{(Refer to the provided diagram)}
Select the option where parts ‘A’, ‘B’, and ‘C’ are correctly identified.
1
A – Connective, B – Endothecium, C – Pollen grain.
2
A – Endothecium, B – Connective, C – Pollen grain.
3
A – Pollen grain, B – Connective, C – Endothecium.
4
A – Endothecium, B – Pollen grain, C – Connective.
06
PYQ 2024
medium
biology ID: cbse-cla
Observe the schematic representation of assisted reproductive technology given below:
Identify the most appropriate technique depicted in the above diagram.
1
IUT
2
IUI
3
ICSI
4
ZIFT
07
PYQ 2024
medium
biology ID: cbse-cla
(ii) Describe the different steps in the sexual mode of reproduction in the life cycle of a malarial parasite.
08
PYQ 2024
medium
biology ID: cbse-cla
Select the option that gives the correct identification of ovum, morula, and blastocyst in a human female reproduction system as shown in the following diagram:
\begin{figure}[h!] \centering \includegraphics[width=0.5\linewidth]{Screenshot 20250115 135817.png} % Replace with the correct path to your image \caption{Human Female Reproductive System} \label{Human Female Reproductive System} \end{figure}
\begin{figure}[h!] \centering \includegraphics[width=0.5\linewidth]{Screenshot 20250115 135817.png} % Replace with the correct path to your image \caption{Human Female Reproductive System} \label{Human Female Reproductive System} \end{figure}
1
Ovum – B, Morula – D, Blastocyst – F
2
Ovum – A, Morula – B, Blastocyst – G
3
Ovum – A, Morula – E, Blastocyst – G
4
Ovum – B, Morula – D, Blastocyst – G
09
PYQ 2024
medium
biology ID: cbse-cla
The ploidy of apomictic embryos developing from the nucellus and antipodal cells respectively would be:
Options:
Options:
1
2n, 3n
2
2n, n
3
3n, 2n
4
n, 2n
10
PYQ 2024
medium
biology ID: cbse-cla
Write the ‘palindrome’ recognized by EcoRI.
11
PYQ 2024
medium
biology ID: cbse-cla
Name ‘A’ and ‘B’ fragments.
12
PYQ 2024
medium
biology ID: cbse-cla
Chemical Safety Testing:
13
PYQ 2024
medium
biology ID: cbse-cla
Explain Brood parasitism with the help of a suitable example.
14
PYQ 2024
medium
biology ID: cbse-cla
Name any two hotspots in India.
15
PYQ 2024
medium
biology ID: cbse-cla
Study the graph given below that represents the changes in the thickening of the uterine wall in women ‘X’ and women ‘Y’ over a period of one month:
What does the graph with respect to women ‘X’ and woman ‘Y’ indicate? Give a suitable reason.
What does the graph with respect to women ‘X’ and woman ‘Y’ indicate? Give a suitable reason.
16
PYQ 2024
medium
biology ID: cbse-cla
Why does a patient of ADA-deficiency require repeated infusions of genetically engineered lymphocytes? Suggest a possible permanent remedy.
17
PYQ 2024
medium
biology ID: cbse-cla
What is artificial insemination in ART? Under what conditions is the person medically advised to go for it?
18
PYQ 2024
medium
biology ID: cbse-cla
Assertion (A): A given fig species can be pollinated only by its partner wasp.
Reason (R): The wasp pollinates the fig inflorescence while searching for suitable egg-laying sites.
Reason (R): The wasp pollinates the fig inflorescence while searching for suitable egg-laying sites.
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true and (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
19
PYQ 2024
medium
biology ID: cbse-cla
Assertion (A): Patents are granted by governments to an inventor.
Reason (R): Patents prevent others from commercial use of an invention.
Reason (R): Patents prevent others from commercial use of an invention.
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true and (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.
20
PYQ 2024
medium
biology ID: cbse-cla
A person with trisomy of 21st chromosome shows:
(i) Furrowed tongue
(ii) Characteristic palm crease
(iii) Rudimentary ovaries
(iv) Gynaecomastia
Select the correct option from the choices given below:
(i) Furrowed tongue
(ii) Characteristic palm crease
(iii) Rudimentary ovaries
(iv) Gynaecomastia
Select the correct option from the choices given below:
1
(ii) and (iv)
2
(i), (ii) and (iv)
3
(ii) and (iii)
4
(i) and (ii)
21
PYQ 2024
medium
biology ID: cbse-cla
Homologous organs indicate:
1
Convergent evolution
2
Divergent evolution
3
Adaptive radiation
4
Natural selection
22
PYQ 2024
medium
biology ID: cbse-cla
Study the following diagram of Transverse Section of a young anther of an angiosperm:
Select the option where parts ‘A’, ‘B’ and ‘C’ are correctly identified.
Select the option where parts ‘A’, ‘B’ and ‘C’ are correctly identified.
1
A – Connective, B – Endothecium, C – Pollen grain.
2
A – Endothecium, B – Connective, C – Pollen grain.
3
A – Pollen grain, B – Connective, C – Endothecium.
4
A – Endothecium, B – Pollen grain, C – Connective.
23
PYQ 2024
easy
biology ID: cbse-cla
Which of the options has correct identification of ‘P’, ‘Q’, and ‘R’ in the illustration of ‘Central Dogma’ given below?
24
PYQ 2024
medium
biology ID: cbse-cla
Turner’s syndrome in humans occurs due to:
1
Aneuploidy
2
Euploidy
3
Polyploidy
4
Autosomal abnormality
25
PYQ 2024
medium
biology ID: cbse-cla
Explain the charging of an adaptor molecule. Why does this molecule need to be charged?
26
PYQ 2024
medium
biology ID: cbse-cla
Which one of the two curves is more “realistic” and why?
27
PYQ 2024
medium
biology ID: cbse-cla
Growth curve ‘B’ shows a different pattern from that of growth curve ‘A’. Justify giving one reason.
28
PYQ 2024
medium
biology ID: cbse-cla
Mention what does the dotted line in the graph indicate and state its importance also.
29
PYQ 2024
medium
biology ID: cbse-cla
Identify the growth curves ‘A’ and ‘B’.
30
PYQ 2024
medium
biology ID: cbse-cla
Whose skulls ‘A’, ‘B’, and ‘C’ are shown below? Which of the two are more similar to each other?