Important Biology Questions

NEET UG Biology
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:white_check_mark:Important Questions for NEET 2023 Biology

  1. What is the correct representation of organisation levels in living beings?
    :point_right:t2:Atomic→Molecular→Subcellular→Cellular→Tissue→Organ System→Individual

  2. What is the first step of taxonomy?
    :point_right:t2:The first step of taxonomy is the identification of the organism.

  3. What is the sequence of taxonomic categories?
    :point_right:t2:Division→Class→Order→Family→Tribe→Genus→Species

  4. What do you mean by Biological Classification?
    :point_right:t2:To identify dissimilarities among organisms and place them into groups that reflect their most important features and relationship.

  5. Why does Funaira require water?
    :point_right:t2:In Funaira, fertilisation occurs only in water. Therefore, it requires water.

  6. What do you mean by Phenetics?
    :point_right:t2:Phenetics is a method of classification based on similarities between organisms without regard to their evolutionary relationships. In this classification, the organisms are arranged according to the overall similarities of existing organisms based on observation characters.

  7. Name the two animals that have non-glandular skin.
    :point_right:t2:Chameleon and Turtle.

  8. Name the common feature shared by birds and mammals.
    :point_right:t2:Both are warm-blooded.

  9. What are adventitious roots?
    :point_right:t2:Roots developed from the part of the plant other than the radicle are called adventitious roots.

  10. Where does the placenta attach to develop the seed?
    :point_right:t2:It is attached to the developing seed near the hilum

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So here are some

  1. Why does R. Q. get highest when the respiratory substance is maleic acid?

It happens because maleic acid is an organic acid that produces CO₂ after oxidation. Due to which R. Q. gets highest.

  1. It is said that Phosphorus plays an important role in the energy metabolism process. Why?

It is because Phosphorus produces ATP energy during the energy metabolism process.

  1. What is differentiation?

It is the process when totipotent embryonic stem cells change their structure, shape, and chemistry to meet the function they perform.

  1. Why is abscisic acid known as a stress hormone?

Abscisic acid is known as a stress hormone because it increases the tolerance of plants to various stresses.

  1. How many monophyodont teeth are there in human beings?

There are eight premolars and four molars in human beings.
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So here are some

  1. What happens when potassium ions enter the guard cells?

When K⁺ ions enter the guard cells, stomata open, and when K⁺ ions exit the guard cells, stomata close.

  1. What is the use of a Potometer?

It is used to determine the rate of transpiration in plants.

  1. Which bacteria converts ammonia into nitrite?

Nitrosomonas.

4.What is Hydroponics?

It is the technique of growing plants without soil in the nutrient solution.

  1. To form a glucose molecule, how many molecules of ATP and NADPH₂ are required in plants?

Plants required 18 molecules of ATP and 12 molecules of NADPH₂ during the formation of glucose.

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  1. What is the correct sequence of the air passage in a man?

External nares→Nasopharynx→Larynx→Trachea→Bronchi→Bronchioles→Alveoli

  1. Why is CO more toxic than CO₂?

Haemoglobin shows a maximum affinity for CO, and CO reduces the oxygen-carrying capacity of haemoglobin. It makes CO more toxic than CO₂.

  1. What is Pericardium?

The heart is encircled in a double-walled sac known as Pericardium.

  1. Name the doctor who performed the first heart transplant.

William Harvey.

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So here are some more

  1. In which part does Aldosterone act?

Distal Convoluted Tubule (DCT).

  1. Which part of the nephron is also called Renal Corpuscle?

Bowman’s capsule and Glomerulus.

  1. What is muscular dystrophy?

A genetic disorder resulting in progressive degeneration of skeletal muscles is called muscular dystrophy.

  1. What is Rigour Mortis?

Rigidity produced in muscles after the death of the person is called Rigour Mortis

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Some more questions :white_check_mark:

  1. How does the potential of the resting membrane maintain?

Resting membrane potential is maintained by ion pumps.

  1. Who controls the function of visceral organs?

Sympathetic and parasympathetic neural systems control it.

  1. What is the responsibility of thymosin?

It’s responsible for the differentiation of T-lymphocytes.

  1. What is the name of the group of hormones produced by Leydig cells?

They produce a group of hormones called androgens.

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Some more questions✅

  1. Match the following:

Column A Column B
Potato Conjugation
Spirogyra Stem cuttings
Rose Conidiospores
Penicillium Stem tubers
Potato – Stem tuber, Spirogyra – Conjugation, Rose – Stem cuttings, Penicillium – Conidiospores

  1. Why are dogs called seasonal breeders?

Dogs are seasonal breeders because they exhibit the oestrous cycle only during favourable seasons in their reproductive phase

  1. What is the meaning of siphonogamy in angiosperm?

In seed plants, fertilisation is known as siphonogamy. A pollen tube brings the male gametes to the egg containing the female gametophyte.

  1. What is a haploid plant?

A plant raised from a single germination pollen grain under cultural conditions is called a haploid plant.