CUET UG Biology: Mock Test - 5 Free Online Test 2026

Brassica crops are the most suitable location for keeping beehives. This is because Brassica plants, such as mustard, produce large amounts of nectar, which bees can use to make honey. The presence of beehives near Brassica crops not only aids in the production of honey but also enhances the pollination of these crops, leading to better yields.

Key Points

• Brassica crops such as mustard are highly beneficial for beekeeping due to their high nectar production.
• The placement of beehives near these crops can significantly improve their pollination and, subsequently, crop yield.

Additional Information

• Potato and Ginger crops are less suitable for beekeeping as they do not produce as much nectar as Brassica crops.
• While Sugarcane can produce a significant amount of nectar, its tall structure can make it difficult for bees to access compared to the open flowers of Brassica.
• Choosing the right location for beehives is crucial for both the health of the bees and the productivity of the crop.

The correct match will be:

Mendel’s Law of Independent Assortment states that genes for different traits are inherited independently of each other.

The numbers 9, 3, 3, and 1 represent the different combinations of dominant and recessive traits seen in the offspring.

The Law of Independent Assortment is illustrated by the dihybrid cross, where two traits assort independently.

The F2 generation of a dihybrid cross follows a phenotypic ratio of 9:3:3:1, showing the different combinations of two traits.

(A) Correct: Mutation and genetic recombination are essential sources of genetic variation in populations.
(B) Incorrect: Darwin’s theory was not fully accepted immediately, as it lacked knowledge about genetics at the time.
(C) Correct: The fossil record provides important evidence of the gradual changes in life forms over geological time.
(D) Correct: Speciation leads to the formation of new species when populations become reproductively isolated and evolve differently.
(E) Incorrect: Natural selection operates on both phenotypic and genotypic traits because phenotypes are determined by genotypes.

(A) Correct: Immunity can be acquired through vaccination, which helps build memory against specific pathogens.
(B) Incorrect: Passive immunity is immediate and temporary, as it involves the direct transfer of antibodies.
(C) Correct: The body produces antibodies in response to antigens to neutralize pathogens.
(D) Correct: Malaria is transmitted by the bite of an infected Anopheles mosquito.
(E) Incorrect: HIV is transmitted through blood, sexual contact, or from mother to child, not through casual contact.

(A) Correct: Lactic acid bacteria (LAB) are used to ferment milk into curd.
(B) Correct: Saccharomyces cerevisiae is used in fermentation processes to produce ethanol and alcoholic beverages.
(C) Incorrect: Penicillin is produced by the fungus Penicillium notatum, not a bacterium.
(D) Incorrect: Microbes like bacteria and fungi are essential in the production of many food items, including cheese.
(E) Correct: Methanogens are responsible for producing biogas from plant waste.

Watson and Crick proposed the double-helix model of DNA structure in 1953, based on data from X-ray diffraction by Franklin and Wilkins.

The two strands of DNA are complementary, meaning that adenine pairs with thymine, and guanine pairs with cytosine, maintaining the stability of the helix.

The stability of the DNA structure is due to hydrogen bonds between complementary bases, such as adenine and thymine, and guanine and cytosine.

DNA replication ensures that each daughter cell receives an identical copy of the DNA, maintaining genetic continuity.

Complementary base pairing ensures that the correct base is added during DNA replication, maintaining the accuracy of the genetic code.

(A) Correct: Trichoderma is a fungus used as a biocontrol agent to fight against plant pathogens.
(B) Correct: Biogas is produced by methanogens from organic waste, including animal dung.
(C) Correct: Fermentation for industrial purposes occurs in large vessels known as fermentors.
(D) Incorrect: Antibiotics are produced by both bacteria and fungi, not just fungi.
(E) Incorrect: Biofertilizers are living organisms, not chemical substances.

Signal for parturition comes from fully developed fetus and placenta. Oxytocin and relaxis play major role in parturition fetus shows movements first time during fifth month pregnancy. Embryo's heart is formed after the first month pregnancy.

The milk produced during the initial few days of lactation is called colostrum which contains several antibodies absolutely essential to develop resistance for the new born babies.

In test tube baby or in vitro fertilisation technique, the ovum is fertilised with the sperm outside the body of a woman providing the ovum with the same environmental conditions as it would have got inside the uterus. The zygote formed is grown inside a culture and when embryo (having 8 or more blastomeres) is formed, it is then implanted into uterus where it develops into foetus.