NEET Biology | Daily MCQs Practice Questions | 20 July 2024 | NEET Exam

Assertion (A) :– The principle of vaccination is based on memory property of our immune system.
Reason (R) :– Vaccines generates memory-B and T cells that recognise the pathogen quickly on subsequent exposure.

Which of the following had smallest brain capacity?

Homologous structures are a result of:

Which of the following statements are not correct ?
(A) Microbodies are present in both plant and animal cells.
(B) All chromosomes have a staining secondary constriction at constant location.
(C) Each centriole has an organisation like cartwheel in longitudinal section
(D) Matrix of mitochondria contains enzymes required for the synthesis of carbohydrate only.

In animal cells. how many of the following can have ribosomes? 

cytoplasm, centrosome, endoplasmic reticulum, chloroplast, Golgi body, mitochondria.

Which of the following event does not occur in mitosis?

Choose the correct sequence of stages of Prophase I :

How many chromatids and chromosomes are present in one bivalent during metaphase I ?

Consider the given two statements :
I. During G₁ phase, the cell is metabolically active and continuously grows but does not replicate its DNA.
II. During G₂ phase, proteins are synthesised in preparation for mitosis while cell growth is not seen.
Of the two statements ;

Mitotic spindle is mainly composed of which proteins?

If egg of an organism has 10 pg of DNA in its nucleus. How much DNA would a diploid cell of same organism have in G₂ phase of meiosis?

Which one is covalent bond among following in protein 3-D form ?

The 20 different amino acid have different :-

A device which provides the optimal conditions for achieving the desired product by providing optimal growth conditions (temperature, pH, substrate, salt, vitamins, oxygen) is called –

Given below are two statements:
Statement I : Restriction endonuclease is not an important tool of biotechnology.
Statement II : Ligase enzyme is responsible for joining of DNA fragment.

In the light of the above statements, choose the correct answer from the options given below: