OnlineCBT
Biology · MICROBES IN HUMAN WELFARE
Practice questions & answers
Find a question, read its answer and explanation, then practise related questions.
6627 questions
Current Affairs · 2026-06-02
President Droupadi Murmu presented the President’s Police Colour to the police force of which state during her visit in May 2026?
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
A projectile of mass \( 3m \) is fired from the origin with speed \( u \) at an angle of \( 45^\circ \) to the horizontal. At the highest point of its trajectory, it explodes into two fragments of mass \( m \) and \( 2m \). If the fragment of mass \( m \) immediately falls vertically downwards to the ground, at what horizontal distance from the origin does the fragment of mass \( 2m \) land? (Neglect air resistance, \( R \) is original range).
Read answer →Biology · PYQ NEET UG 2026
Adaptive radiation in placental mammals and Australian Marsupials leading to similarity between distant species is an example of
Read answer →Chemistry · Some Basic Concepts of Chemistry
According to the convention for rounding off numbers, if the rightmost digit to be removed is \( 5 \), followed by no other digits, which of the following pairs are correctly rounded off to two significant figures?
Read answer →Botany · PYQ NEET UG 2023
Which of the following statements are correct about Klinefelter's Syndrome? A. This disorder was first described by Langdon Down (1866). B. Such an individual has overall masculine development. However, the feminine development is also expressed. C. The affected individual is short statured. D. Physical, psychomotor and mental development is retarded. E. Such individuals are sterile. Choose the correct answer from the options given below :
Read answer →Current Affairs · 2026-09-23
India’s 51st state-of-the-art Doppler Weather Radar (DWR) was inaugurated at Jamadarpali in which district and state?
Read answer →Biology · HUMAN REPRODUCTION
Calculate the maximum possible number of seminiferous tubules present in both testes of a healthy adult human male based on standard NCERT anatomical data:
Read answer →Physics · WORK, ENERGY AND POWER
An electric pump is used to fill a water tank of capacity \( 30\text{ m}^3 \) located at a height of \( 40\text{ m} \) above the ground in \( 15\text{ minutes} \). If the overall efficiency of the pump is \( 30\% \) and \( g = 9.8\text{ m s}^{-2} \), the electrical power consumed by the pump is:
Read answer →Biology · BIODIVERSITY AND CONSERVATION
Given below are two statements: Statement I: India possesses more than 50,000 genetically different strains of rice and 1,000 varieties of mango. Statement II: Genetic diversity refers exclusively to the total number of distinct communities and ecosystems found across an entire continent. In the light of the above statements, choose the most appropriate answer from the options given below:
Read answer →Biology · MICROBES IN HUMAN WELFARE
Which microbial enzyme is used in detergent formulations and is helpful in removing oily stains from laundry?
Read answer →Current Affairs · 2026-09-18
Who has been appointed as the Chairperson of the newly reconstituted Central Board of Film Certification (CBFC) in September 2026?
Read answer →Current Affairs · 2026-08-31
The Department of Legal Affairs (DoLA) notified the establishment of the Mediation Council of India under which section of the Mediation Act, 2023?
Read answer →Biology · PYQ NEET UG 2019(2)
Where is the respiratory electron transport system (ETS) located in plants?
Read answer →Chemistry · Structure of atom
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Macroscopic objects in our daily life do not show wave-like properties. Reason (R): The wavelengths associated with macroscopic objects are extremely short because of their large mass. In the light of the above statements, choose the correct answer from the options given below:
Read answer →Chemistry · Structure of atom
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).\n Assertion (A): The energy of the orbitals in a hydrogen atom depends solely on the principal quantum number \( n \).\n Reason (R): In a hydrogen atom, the 2s and 2p orbitals have exactly the same energy. \nIn the light of the above statements, choose the correct answer from the options given below:
Read answer →Current Affairs · 2026-07-31
Field assessments and research under the MoTA and CSIR-NBRI MoU require Prior Informed Consent (PIC) in compliance with which act?
Read answer →Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS
Read the following statements about pollination by water: Statement I: Pollination by water is quite common in flowering plants and occurs in over 200 genera of both dicots and monocots. Statement II: The distribution of some bryophytes and pteridophytes is limited because of the requirement of water for transport of male gametes and fertilisation. Choose the correct option:
Read answer →Biology · PYQ NEET UG 2018
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
Read answer →Chemistry · Structure of atom
An atom of an element contains \( 29 \) electrons and \( 35 \) neutrons. Deduce the number of protons and the atomic number of the element.
Read answer →Current Affairs · 2026-10-03
Who was appointed as the Prime Minister of Morocco, making history as the first woman Prime Minister of the country?
Read answer →Physics · UNITS AND MEASUREMENT
A spherical surface area element \( dA = 0.25\text{ m}^2 \) at a distance \( r = 0.5\text{ m} \) from the center subtends a solid angle \( \Omega \). An arc of length \( ds = 0.2\text{ m} \) on a circle of the same radius \( r = 0.5\text{ m} \) subtends a plane angle \( \theta \). The ratio of the numerical value of \( \Omega \) (in steradians) to \( \theta \) (in radians) is:
Read answer →Current Affairs · 2026-09-18
Who has been named as the 56th recipient of the prestigious Dadasaheb Phalke Award for the year 2024?
Read answer →Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
