Botany MCQs for NEET — Practice Questions with Answers

For dicot root: 'The outermost layer is epiblema. Many of the cells of epiblema protrude in the form of unicellular root hairs.' For monocot root: 'It has epidermis [epiblema]...'. Both primary roots will have epiblema and root hairs. Monocot roots lack secondary growth, but dicot roots do undergo secondary growth. Pith size and xylem bundle numbers differ.

The NCERT states for dicotyledonous stem: 'The outer hypodermis, consists of a few layers of collenchymatous cells just below the epidermis, which provide mechanical strength to the young stem.'

The NCERT reads: 'The parenchymatous cells which lie between the xylem and the phloem are called conjuctive tissue.'

The NCERT states: 'The parallel venation in monocot leaves is reflected in the near similar sizes of vascular bundles (except in main veins) as seen in vertical sections of the leaves.'

From the summary, it states: 'The secondary growth occurs in most of the dicotyledonous roots and stems.' And for monocotyledonous root: 'Monocotyledonous roots do not undergo any secondary growth.' For monocotyledonous stem, the text implies closed vascular bundles do not form secondary tissues. Thus, dicots generally exhibit secondary growth, while monocots typically do not.

According to the NCERT text, 'These sequences normally do not code for any proteins, but they form a large portion of human genome.' Therefore, option o2 is incorrect.

The NCERT text states: 'As stated in the preceding section, 99.9 per cent of base sequence among humans is the same.'

The NCERT text explicitly mentions: 'The technique of DNA Fingerprinting was initially developed by Alec Jeffreys.'

The NCERT text states: 'The VNTR belongs to a class of satellite DNA referred to as mini-satellite.'

The context describes 'Souther n blot hybridisation using radiolabelled VNTR as a probe' and lists steps including isolation, digestion, separation, transferring, hybridisation, and detection. PCR amplification is not mentioned as part of the described technique.