List of top Biology Questions

Which of the following is methanol poisoning derivatives?
A farmer who was on maize as a staple diet develops a rash on the face, neck, and hands. Which of the following vitamins should be given in the treatment?

Increased Km and unchanged Vmax is seen in which of the following inhibition? 

Increased chylomicron, lipemic serum is seen in:
Which of the following enzymes is deficient in a patient with Phenylketonuria if phenylalanine hydroxylase level is normal?
A male patient with pallor, weakness, and easy fatigability. His blood report shows MCV 53, TIBC- Increased. What is your diagnosis?
Draw illustrations to bring out the anatomical difference between (a) Monocot root and Dicot root (b) Monocot stem and Dicot stem
Arrange the following in current sequence from first to last steps in sewage water treatment plant.
(A) Sedimentation and filteration
(B) Screening
(C) Chemical disinfection
(D) Biological treatment
Choose the correct answer from the options given below:
Antifertilizin or bindin is present over the sperm in the region of
Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.
State two economically important uses of:
  1. heterotrophic bacteria
  2. archaebacteria
What is the primary function of the large intestine in the human digestive system?
Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
Which of the following is incorrectly matched?

Read the following statements about the vascular bundles

  1. In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
  2. Conjoint closed vascular bundles do not possess cambium
  3. In open vascular bundles, cambium is present in between xylem and phloem
  4. The vascular bundles of dicotyledonous stem possess endarch protoxylem
  5. In monocotyledonous root, usually there are more than six xylem bundles present

Choose the correct answer from the options given below:

The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are:
DNA polymorphism forms the basis of:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Polymerase chain reaction is used in DNA amplification.
Reason (R): The ampicillin resistant gene is used as a selectable marker to check transformation.
In the light of the above statements, choose the correct answer from the options given below:

Which of the following combinations is required for chemiosmosis?

Give three hypotheses for explaining why tropics show greatest levels of species richness.
Match Column-I with Column-II for housefly classification and select the correct option using the codes given below :
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome

In a population of rabbits, the brown fur color (B) is dominant to the white fur color (b). If a heterozygous brown rabbit is crossed with a homozygous white rabbit, what is the probability of their offspring having brown fur?

In a plant cell, which organelle is primarily responsible for photosynthesis?

What is the role of mitochondria in the cell, and how does their structure relate to their function?