CUET 2026 Biology May 19 Shift 2 Question Paper- Download Answer Key and Solution PDF

The ratio of number of microspore tetrads formed : total microspores produced from \(50\) MMCs is

• (A) \(1:2\)
• (B) \(1:3\)
• (C) \(1:4\)
• (D) \(4:1\)

The position of antipodals in mature embryo sac in angiosperm plant is

• (A) At chalazal end
• (B) At micropylar end
• (C) In central part
• (D) In synergid

Identify the correct sequence of mature embryo formation from zygote.
Stages given:
[(A)] Heart-shaped embryo
[(B)] Globular embryo
[(C)] Proembryo
[(D)] Mature embryo
Choose the correct answer from the options given below:

• (A) \((A),\ (B),\ (C),\ (D)\)
• (B) \((B),\ (A),\ (D),\ (C)\)
• (C) \((A),\ (D),\ (B),\ (C)\)
• (D) \((C),\ (B),\ (A),\ (D)\)

Match List-I with List-II.

Choose the correct answer from the options given below:

• (A) \(A \to (I),\ B \to (II),\ C \to (III),\ D \to (IV)\)
• (B) \(A \to (III),\ B \to (I),\ C \to (II),\ D \to (IV)\)
• (C) \(A \to (I),\ B \to (II),\ C \to (IV),\ D \to (III)\)
• (D) \(A \to (III),\ B \to (IV),\ C \to (I),\ D \to (II)\)

Select the correct statements regarding menstrual cycle in human female:
[(A)] The first menstruation begins at puberty and is called menopause.
[(B)] The ovulation takes place in the middle of cycle (about \(14^{th}\) day), when the level of progesterone is at maximum level.
[(C)] In absence of fertilisation, the corpus luteum degenerates which causes the disintegration of endometrium leading to menstruation.
[(D)] In human beings, menstrual cycle ceases around \(50\) years of age.

Choose the correct answer from the options given below:

• (A) \((A)\ and\ (B)\ only\)
• (B) \((B)\ and\ (D)\ only\)
• (C) \((A)\ and\ (C)\ only\)
• (D) \((C)\ and\ (D)\ only\)

Arrange the following ducts pertaining to male reproductive system starting from seminiferous tubules.
Ducts given:
[(A)] Vas deferens
[(B)] Vasa efferentia
[(C)] Rete testis
[(D)] Epididymis
Choose the correct answer from the options given below:

• (A) \((A),\ (B),\ (C),\ (D)\)
• (B) \((B),\ (C),\ (D),\ (A)\)
• (C) \((D),\ (A),\ (B),\ (C)\)
• (D) \((C),\ (B),\ (D),\ (A)\)

Which of the following statements is incorrect with respect to Medical Termination of Pregnancy?

• (A) They are considered safe during the first trimester.
• (B) It is legalized in India from \(1971\).
• (C) MTPs can be performed even after \(24\) weeks, but with the opinion of \(2\) registered medical practitioners on specific grounds.
• (D) About \(20%\) of the total number of concerned pregnancies undergo MTP in a year globally.

Select the correctly matched pair about sickle cell anaemia: Genotype : Phenotype
[(A)] \(Hb^A Hb^A\) : Diseased phenotype
[(B)] \(Hb^A Hb^S\) : Diseased phenotype
[(C)] \(Hb^S Hb^S\) : Diseased phenotype
[(D)] \(Hb^S Hb^A\) : Carrier of disease
Choose the correct answer from the options given below:

• (A) \((C)\ and\ (D)\ only\)
• (B) \((A)\ and\ (C)\ only\)
• (C) \((B),\ (C)\ and\ (D)\ only\)
• (D) \((A),\ (B)\ and\ (C)\ only\)

Given below are two statements:
Statement I: Phenylketonuria is an example of pleiotropy
Statement II: Affected individuals lack an enzyme which converts phenylalanine into tyrosine.
In the light of the above statements, choose the most appropriate answer from the options given below:

• (A) Both Statement I and Statement II are correct
• (B) Both Statement I and Statement II are incorrect
• (C) Statement I is correct but Statement II is incorrect
• (D) Statement I is incorrect but Statement II is correct

The scientist who noted that ``The behaviour of chromosomes was parallel to the behaviour of genes'' were:

• (A) Sutton and Boveri
• (B) de Vries, Correns and Tschermak
• (C) Punnett and Bateson
• (D) Morgan and Bridges