List of top Biology Questions asked in CUET (UG)

Arrange the following on the basis of their origin, from earliest to latest:
(A) Homo habilis
(B) Neanderthal Man
(C) Ramapithecus
(D) Homo sapiens
(E) Homo erectus

Homologous organs are:

Match List-I with List-II:

List-I (Scientist)	List-II (Contribution)
(A) A. Jeffreys	(I) Nuclein
(B) Miescher	(II) Amino acid formation
(C) J. Monod	(III) DNA fingerprinting
(D) S.L. Miller	(IV) Transcriptionally regulated system

Which of the following is not a component of DNA?

The enzyme helpful in polymerizing RNA with defined sequences in a template-independent manner is:

RNA is a labile molecule due to the presence of:

Match List-I with List-II:

List-I	List-II
(A) Thalassemia	(I) 47, XXY
(B) Klinefelter’s syndrome	(II) Sex-linked recessive disorder
(C) Turner’s syndrome	(III) 45, XO
(D) Colour blindness	(IV) Autosomal recessive disease

Of the following statements, which is/are correct?
(A) During incomplete dominance, the modified allele is the dominant allele
(B) In polygenic inheritance, the effect of each allele is additive
(C) A gene is called pleiotropic when it exhibits multiple phenotypic expressions
(D) Mutation means alteration of DNA sequence which ensures change only in the phenotype of an organism
Choose the correct answer from the options given below:

The gene HBB for β-thalassemia is present on which chromosome?

In the given pedigree chart, ‘P’ is a female suffering from a disease, which is denoted by ‘A’ (dominant allele) and ‘a’ (recessive allele). Find the genotype of ‘P’.

Choose the statements which are correct with respect to the Medical Termination of Pregnancy (MTP) Act, 2017:
(A) Approximately \(20\%\) of the conceived pregnancies undergo MTP globally in a year
(B) MTP is legalized in India up to four months unconditionally
(C) Amniocentesis is mandatory before performing MTP
(D) MTPs are considered relatively safe up to 12 weeks of pregnancy
Choose the correct answer from the options given below:

Which of the following is incorrect regarding oral contraceptives?

Hormone releasing Intra Uterine Device is:

Match List-I with List-II:

List-I (Kind of Pollination)	List-II (Features)
(A) Autogamy	(I) Pollination involving flowers of two different plants
(B) Geitonogamy	(II) Pollination involving water
(C) Xenogamy	(III) Pollination involving two flowers of the same plant
(D) Hydrophily	(IV) Pollination involving the same flower

Arrange the given stages of Megasporogenesis in chronological order.
(A) Megaspore tetrad
(B) Megaspore dyad
(C) Megaspore mother cell
(D) Female gametophyte
Choose the correct answer from the options given below:

Production of seeds without fertilization is known as:

Arrange the given steps of DNA fingerprinting in the sequence from initiation to end:
(A) Digestion of DNA by restriction endonuclease
(B) Isolation of DNA
(C) Hybridisation using labelled VNTR probe
(D) Transferring (blotting) of separated DNA fragments to synthetic membrane
Choose the correct answer from the options given below:

Which of the following statements are incorrect with respect to nucleotides?
(A) Purines and pyrimidines are nitrogenous bases.
(B) Nucleotides are non-enzymatic molecules.
(C) Phosphate group is linked to – OH of 5′ C of a nucleoside through phosphoester linkage.
(D) In RNA, every nucleotide residue has an additional – OH group present at 2′ position in the ribose.
(E) Thymine is an example of Pyrimidine.
Choose the correct answer from the options given below:

Match List-I with List-II:

List-I (Scientists)	List-II (Discovery)
(A) Sutton and Boveri	(II) Chromosomal Theory of Inheritance
(B) Sturtevant	(IV) Genetic maps
(C) Henking	(I) X-Body
(D) Griffith	(III) Transformation in bacteria

Choose the correct answer from the options given below:

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:

Failure of chromatids to segregate during cell division cycle results in:

Which of the following pair of contrasting traits was not studied by Mendel?

Arrange the following stages of oogenesis in order of their occurrence:
(A) Ovum
(B) Oogonia
(C) Primary oocyte
(D) Secondary oocyte
Choose the correct answer from the options given below:

Sex in human embryos is determined by:

In humans, mammary glands are divided into ___ lobes: