Blog Log in Get Started Free

Botany MCQs for NEET — Practice Questions with Answers

Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology

Chapter Language Difficulty Show only questions I answered incorrectly Register free to filter questions

● ● ● ● ●

The primary cause of photorespiration is the competitive binding of which two molecules to the active site of RuBisCO?

A. $\text{ATP}$ and $\text{NADPH}$ B. Water and Carbon Dioxide C. Carbon Dioxide and Oxygen D. Glucose and Starch

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The text highlights that 'RuBisCO also catalyses a wasteful oxygenation reaction' in addition to its role in $\text{CO}_2$ fixation. This 'oxygenation reaction' arises from the competition between $\text{CO}_2$ and $\text{O}_2$ for RuBisCO's active site.

● ● ● ● ●

Which of the following describes a key anatomical difference in the vascular bundles of monocot and dicot stems?

A. In dicot stems, vascular bundles are scattered, while in monocot stems, they are arranged in a ring. B. Dicot stems have conjoint and closed vascular bundles, whereas monocot stems have conjoint and open vascular bundles. C. Monocot stems typically lack cambium in their vascular bundles, making them closed, while dicot stems possess cambium, making them open. D. The phloem is located on the inner side of xylem in monocot stems, unlike dicot stems where it's on the outer side.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

According to the NCERT text, 'In dicotyledonous stems, cambium is present between phloem and xylem. Such vascular bundles because of the presence of cambium possess the ability to form secondary xylem and phloem tissues, and hence are called open vascular bundles. In the monocotyledons, the vascular bundles have no cambium present in them. Hence, since they do not form secondary tissues they are referred to as closed.'

● ● ● ● ●

A transverse section of a plant material reveals vascular bundles that are conjoint, scattered, and surrounded by a sclerenchymatous bundle sheath. Phloem parenchyma is absent, and water-containing cavities are present. Based on these features, what would you identify this plant material as?

A. Dicot Root B. Monocot Stem C. Dicot Stem D. Monocot Root

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT text states: 'The monocot stem has a sclerenchymatous hypodermis, a large number of scattered vascular bundles, each surrounded by a sclerenchymatous bundle sheath, and a large, conspicuous parenchymatous ground tissue...The phloem parenchyma is absent, and water-containing cavities are present within the vascular bundles.' These features collectively identify a monocot stem.

● ● ● ● ●

Regarding the pith in roots, which of the following statements accurately differentiates dicot and monocot roots?

A. The pith is typically large and well-developed in dicot roots, but small or inconspicuous in monocot roots. B. Both dicot and monocot roots possess a large and well-developed pith. C. Dicot roots have a small or inconspicuous pith, while monocot roots have a large and well-developed pith. D. The pith is entirely absent in monocot roots, unlike dicot roots.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states for dicot root: 'The pith is small or inconspicuous.' For monocot root, it says: 'Pith is large and well developed.'

● ● ● ● ●

Which of the following anatomical features is characteristic of monocotyledonous leaves as compared to dorsiventral (dicotyledonous) leaves?

A. Absence of a conspicuous cuticle. B. Mesophyll differentiated into palisade and spongy parenchyma. C. Stomata present predominantly on the abaxial surface only. D. Stomata present on both surfaces of the epidermis and undifferentiated mesophyll.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states for isobilateral (monocotyledonous) leaf: 'In an isobilateral leaf, the stomata are present on both the surfaces of the epidermis; and the mesophyll is not differentiated into palisade and spongy parenchyma.' In contrast, for dorsiventral (dicotyledonous) leaf, it says: 'The abaxial epidermis generally bears more stomata than the adaxial epidermis. The latter may even lack stomata. ...Mesophyll... has two types of cells â€“ the palisade parenchyma and the spongy parenchyma.'

● ● ● ● ●

In the context of the vascular system in roots, how do dicot and monocot roots generally differ concerning xylem bundles?

A. Dicot roots usually have more than six (polyarch) xylem bundles, while monocot roots have two to four. B. Both dicot and monocot roots typically have two to four xylem bundles. C. Monocot roots usually have more than six (polyarch) xylem bundles, whereas dicot roots have two to four. D. The number of xylem bundles is highly variable and not a distinguishing feature between dicot and monocot roots.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states: 'As compared to the dicot root which have fewer xylem bundles, there are usually more than six (polyarch) xylem bundles in the monocot root.' For dicot root, it mentions 'There are usually two to four xylem and phloem patches.'

● ● ● ● ●

Which anatomical feature is distinctive of monocot stems often having smaller vascular bundles towards the periphery and larger ones towards the center?

A. Presence of medullary rays. B. Ring arrangement of vascular bundles. C. Scattered vascular bundles with peripheral ones generally smaller. D. Presence of secondary growth.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT text on monocotyledonous stem states: 'a large number of scattered vascular bundles... Peripheral vascular bundles are generally smaller than the centrally located ones.'

● ● ● ● ●

Identify the INCORRECT statement regarding the anatomy of dicot and monocot plants.

A. Monocot roots do not undergo any secondary growth. B. The 'ring' arrangement of vascular bundles is a characteristic of dicot stem. C. In dicot leaves, the mesophyll is undifferentiated into palisade and spongy parenchyma. D. Dicot stems have conjoint, open, and endarch protoxylem in their vascular bundles.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states for dorsiventral (dicotyledonous) leaf: 'Mesophyll... has two types of cells â€“ the palisade parenchyma and the spongy parenchyma.' Therefore, the statement that mesophyll is undifferentiated in dicot leaves is incorrect.

● ● ● ● ●

What is the primary function of bulliform cells found in some monocot leaves like grasses?

A. To provide mechanical strength to the leaf. B. To participate in photosynthesis. C. To regulate water loss by curling the leaves inwards when flaccid. D. To store food reserves for the plant.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT describes bulliform cells: 'When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed. When they are flaccid due to water stress, they make the leaves curl inwards to minimise water loss.'

● ● ● ● ●

The presence of a sclerenchymatous bundle sheath surrounding vascular bundles is a feature observed in:

A. Dicotyledonous root B. Monocotyledonous stem C. Dorsiventral leaf D. Dicotyledonous stem

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The NCERT states: 'The monocot stem has ... a large number of scattered vascular bundles, each surrounded by a sclerenchymatous bundle sheath...'

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

Yes. You can attempt every Botany question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.

No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.

The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.