List of top Biology Questions asked in CUET (UG)

Match List-I with List-II:

List-I Transgene	List-II Used for/Products
(A) α-1-antitrypsin	(III) Treat emphysema
(B) cryIAc	(II) Corn borer
(C) Antisense RNA	(I) Meloidgyne incognitia
(D) cryIAb	(IV) Cotton bollworms

Choose the correct answer from the options given below:

Choose the statements that are correct with respect to continuous culture systems:
(A) In a simple stirred tank bioreactor, stirring happens through sparging of air bubbles
(B) A bioreactor has an agitator system, oxygen delivery system, and foam control system
(C) Sampling ports provide vents to withdraw small volumes of culture periodically
(D) Culturing in bioreactors is classified as downstream processing
Choose the correct answer from the options given below:

The increase in the rate of species loss in the world is due to:
(A) Less use of natural resources
(B) Introduction of alien species
(C) Species confined to a particular area
(D) Removal of one species from co-existed species
(E) Destruction of large landscapes into small areas
Choose the correct answer from the options given below:

Deserts, rain forests, mangroves, coral reefs, wetlands, estuaries, and alpine meadows in India represent:

Tropical regions account for greater biological diversity because of the following reasons, except:

The total energy fixed by a green plant is called:

Which one of the following statements is wrong regarding ecological pyramids?

In which of the following ecosystems, detritus food chain (DFC) is the major conduit for energy flow?

Match List-I with List-II:

List-I (Genes/Products)	List-II (Used in/for)
(A) C-Peptide	(I) Corn borer
(B) α-1-antitrypsin	(II) Rosie
(C) cryIAc	(III) Insulin
(D) α-lactalbumin	(IV) Emphysema

Identify the incorrect statements.
(A) Bacillus thuringiensis is a transgenic organism.
(B) Bt toxin enters the testes or the ovaries of the insect pest, sterilizes it, and thus prevents its multiplication.
(C) Proteins encoded by cryIAc and cryIIAb control cotton bollworms.
(D) Bt protein exists as an active toxin in Bacillus.
(E) Alkaline pH of the insect gut solubilizes the toxin protein crystals.
Choose the correct answer from the options given below:

Transposons are:

For which of the following human diseases was a transgenic model not developed?

Which of the following is not a cause of biodiversity loss?

Arrange the following steps in recombinant DNA technology on the basis of their sequence of occurrence:
(A) Isolation of desired DNA fragments
(B) Culturing the host cells
(C) Extraction of desired product
(D) Ligation of DNA fragment into vector
(E) Transferring of recombinant DNA to host
Choose the correct answer from the options given below:

Identify the missing restriction sites (A, B, and C) in the given E. coli cloning vector pBR322.

Which of the following products is not developed by the use of biotechnology?

Match List-I with List-II:

List-I(Microbes)	List-II (Acid Produced)
(A) Aspergillus	(I) Lactic acid
(B) Acetobacter	(II) Butyric acid
(C) Clostridium	(III) Acetic acid
(D) Lactobacillus	(IV) Citric acid

Match List-I with List-II:

List-I (Function)	List-II (Organism)
(A) Nitrogen fixation (bacterium)	(I) Saccharomyces
(B) Phosphorous absorption	(II) Azospirillum
(C) Nitrogen fixation (cyanobacterium)	(III) Glomus
(D) Ethanol Production	(IV) Oscillatoria

Which vitamin is increased during the conversion of fresh milk to curd?

Match List-I with List-II:

List-I (Diseases)	List-II (Pathogen)
(A) Pneumonia	(I) Wuchereria bancrofti
(B) Typhoid	(II) Microsporum
(C) Ringworm	(III) Salmonella
(D) Elephantiasis	(IV) Haemophilus influenzae

Identify the incorrect statements.
(A) Gametocytes of Plasmodium develop in the RBCs.
(B) Ascariasis pathogens are transmitted to a healthy person through the bite by female mosquito vectors.
(C) Entamoeba histolytica is a helminth parasite in the small intestine of humans, causing amoebiasis.
(D) Malarial parasite reproduces asexually in the gut of the mosquito.
(E) Filarial worms reside in the lymphatic vessels of the lower limbs.
Choose the correct answer from the options given below

The yellowish fluid secreted by the mother during the initial days of lactation has abundant:

The toxic substance released with the rupturing of RBCs during malaria fever is:

Match List-I with List-II:

List-I (Evolutionary Processes)	List-II (Example)
(A) Divergent evolution	(I) Wings of butterfly and birds
(B) Convergent evolution	(II) Lemur and spotted cuscus
(C) Anthropogenic evolution	(III) Hearts of vertebrates
(D) Adaptive Radiation	(IV) Antibiotic resistant microbes

Arrange the following steps of decomposition in the correct order of their sequence:
(A) Humification
(B) Fecal Matter
(C) Leaching
(D) Mineralisation