List of top Biology Questions

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:

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

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

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 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:

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

Transposons are:

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

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

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

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

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?

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

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

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

Which of the following is not a component of DNA?

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

Homologous organs are:

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

RNA is a labile molecule due to the presence of: