Class 12 PT I Question Paper 2024-25 Biology

PERIODIC TEST
QUESTION PAPER
Question Paper for CBSE Board, KV Schools,
State Board following NCERT Syllabus

PT 1 | PT 2

Question Paper based on NCERT Syllabus
+++
CBSE Board Question Paper / KV Schools Question Paper

SESSION 2024-25
UT-I
CLASS XII Sub -BIOLOGY (SET-A)

TIME - 1hr 30 min M.M.-40
Section 1: Competency Based Questions (20 marks)

Type 1: Multiple Choice Questions (4 marks)

1. After fertilized ovule of an angiosperm the cells in which n ,2n,3n conditions respectively
occur are ?
a) antipodal cell, zygote and endosperm b) ) antipodal cell,nucellus cell and endosperm c)
endosperm ,nucellus cell and antipodal - d) endosperm antipodal cell, zygote
2. Where does fertilization occur in the human body?
a) Ovary - b) Uterus - c) Fallopian tube - d) Vagina
3. Which of the following is a contraceptive method?
a) IUD - b) IVF - c) IUI - d) ICSI
4. What is genotype of mother(blood group,A) and father(blood group,B) if blood group of
child is O,?
a) Genotype of an organism - b) IB , IA (c) IA,IB - d) IA i and IB i

Type 2: Passage Based Questions (1marks)
A)Read the passage and answer the questions:
"Reproductive health refers to the complete physical, mental, and social well-being in all
matters relating to the reproductive system. It includes a variety of aspects such as family
planning, prevention of sexually transmitted infections, and maternal health."

5. What does reproductive health encompass?
6. Name one method to prevent sexually transmitted infections.
B)Read the passage and answer the questions:
"Mendel's experiments on pea plants laid the foundation for the laws of inheritance. He
proposed that traits are inherited as discrete units called genes. His work explained the
patterns of inheritance and the role of dominant and recessive alleles."
7.A red flower plant crossed with white flower plant , in F1 generation only pink flowers are
produced , did Mendel's law fallow explain?
8. What is test cross?
9. answer the following questions- ( CCT Questions (2 marks)
A. Explain the process of double fertilization in angiosperms. And product of egg and pollar
nuclei after fertilization?
B. Describe the stages of the menstrual cycle. And function of L.H, FSH.
C. In Honey bee male has grandfather but don,t father prove it
D. Explain the significance of Mendel’s law of segregation.

Type 4: Assertion and Reasoning (4 marks)
10. Assertion: Pollination is necessary for fertilization in flowering plants.
Reason: Pollination allows the transfer of pollen from the anther to the stigma.

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d) Both Assertion and Reason are incorrect.

11. Assertion: Fertilization in humans usually occurs in the fallopian tube.
Reason: The fallopian tube provides an environment conducive to fertilization.
d) Both Assertion and Reason are incorrect.
12. Assertion: Use of condoms is effective in preventing STIs.
Reason: Condoms act as a barrier to prevent the exchange of bodily fluids.
d) Both Assertion and Reason are incorrect.
13. Assertion: Incomplete dominance results in a 3:1 phenotypic ratio.
Reason: Incomplete dominance, neither allele is completely dominant over the other.
d) Both Assertion and Reason are incorrect.

: One Word or One Line Answer Questions (1 marks)
14- Answer the following questions
A. The lemon seeds with polyembryony. Why
B. What is the site of sperm production in males?
C. Name one sexually transmitted infection.
D. What is name of disorder in which( Glu) substitute by (Val)by point mutation?
: Short Answer Questions (3 marks)
15. Draw the diagram of an ovule and labeled any 6 part.
16.Explain the role of the placenta during pregnancy.

Type 2: Long Answer Questions (5 marks)

17. Describe the following
(a) what do you mean by mimic of sexual reproduction (b) name the type of fruit which
produced without fertilization (c) difference between pericarp and perisperm. 2+1+2
18. On the basis of human testis, answer the following questions 1+1+1+2
(i) Why human tests present outside body within scrotum.
(ii) Which Harmon is responsible spermatogenesis

(iii) Name of cells which provide Nourishment to developing sperm
(iv) write functions of interstitial cells

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