Below are the Important Botany MCQs Test Preparation 2024:
Important Botany MCQs 2024:
1➤ When linked characters or genes are inherited together through two or more generations, it is called:
ⓑ Complete linkage
ⓒ Consistent linkage
ⓓ Perfect linkage
2➤ What is the genetical explanation of 1:2:1 ratio?
ⓑ It is both phenotype and genotype ratio of "incomplete dominance
ⓒ Both (a) & (b)
ⓓ Neither (a) nor (b)
3➤ Mendelian recombinations are due to:
ⓑ Independent assortment of characters
ⓒ Linkage
ⓓ Modifications
4➤ Test cross is:
ⓑ To find the genotype of a suspected individual
ⓒ The first cross between two generations
ⓓ That which is done by a student
5➤ The transformation experiments using 'Pneumococcus' gave evidence for the hypothesis that:
ⓑ DNA is the genetic material
ⓒ Chromosomes are made up of DNA
ⓓ Bacteria have sexual reproduction
6➤ A plant has 8 chromosomes in each somatic cell. How many linkage groups will there be?
ⓑ 2
ⓒ 4
ⓓ 8
7➤ One of the x chromosomes of a woman bears two linked genes for haemophiliac and colour blindness. She marries a normal man. How will the progeny be?
ⓑ 50% haemophillic colour-blind sons and 50% normal sons
ⓒ 50% haemophillic daughters and 50% colour blind daughters
ⓓ All sons and daughters are haemophillic and colour-blind
8➤ 8. How many minimum megaspore and microspore mother cells would be involved in producing the female and male gametes required for setting 100 seeds if 25% of the pollen are viable?
ⓑ 100 megaspore mother cells and 25 microspore mother cells
ⓒ 50 microspore mother cells and 100 megaspore mother cells
ⓓ 25 microspore mother cells and 100 megaspore mother cells
9➤ If a pure white hen is crossed with a hybrid blue male, the result will be:
ⓑ All white
ⓒ All black
ⓓ Half blue and half white
10➤ UAA, UAG and UGA codons are known as:
ⓑ Initiation codons
ⓒ Noncoding codon-1
ⓓ Noncoding codon-2
11➤ Who discovered conjugation in bacteria?
ⓑ Zinder and Lederberg
ⓒ Beadle and Tatum
ⓓ Lederberg and Tatum
12➤ Who classified bacteria under Schizomycetes?
ⓑ Linnaeus
ⓒ Leeuwenhoek
ⓓ Sadashivan
13➤ Which one of the following correctly matches a sexually transmitted disease with its pathogen?
ⓑ Gonorrhoea - Leisharnania donovani
ⓒ Syphillis - Treponema pallidium
ⓓ AIDS - Bacillus anthracis
14➤ "Little Leaf of brinjal is caused by:
ⓑ Virus
ⓒ Fungi
ⓓ Mycoplasma
15➤ The disease 'pneumonia' is caused by:
ⓑ Cyanobacteria
ⓒ Bacteria
ⓓ Cold
16➤ Mycoplasmas are not sensitive to:
ⓑ Penicillin
ⓒ Erythromycin
ⓓ Neomycin
17➤ Bacteria reproduce sexually by:
ⓑ Transformation
ⓒ Conidia
ⓓ Exospores
18➤ Bacteria do not possess:
ⓑ Capsule
ⓒ Flagella
ⓓ Nucleus
19➤ Difference in gram positive and gram negative bacteria is due to:
ⓑ Cell membrane
ⓒ Ribosome
ⓓ Cytoplasm
20➤ Polyembryony is shown by:
ⓑ Cycus
ⓒ Mangifera
ⓓ None of these
21➤ Mycoplasmas differ from viruses in being sensitive to:
ⓑ Amino adds
ⓒ Tetracyclin
ⓓ Sugars
22➤ Some viruses multiply as soon as they enter the host cell, resulting in the breakdown of the host cell. Such viruses are called:
ⓑ Virulent viruses
ⓒ Prophage
ⓓ Lysogenic viruses
23➤ The viral chromosome becomes integrated with the host chromoscme and is called prophage. Such viruses are called:
ⓑ Lysogenic viruses
ⓒ Lytic viruses
ⓓ Transducing viruses
24➤ The gene of viruses, abnormal growth and enormous amount of responsible for production of protein after integrating with the host cell, is called:
ⓑ T4 lymphocyte
ⓒ Tumour gene.
ⓓ Mutant gene
25➤ The part of a virus which gives the hereditary integrity to it is known as:
ⓑ Capsid
ⓒ Nucleic acid
ⓓ Nucleotides
26➤ The site where proteins for the protein coat of the viruses are synthesised is the:
ⓑ Ribosome of host
ⓒ Ribosome of the mitochondria
ⓓ Plasma membrane of the host
27➤ The protein coat of viruses, which protects them from nucleases, is called:
ⓑ Capsomere
ⓒ Pellicle
ⓓ Matrix
28➤ Bacteriophage is similar to the funeus in:
ⓑ Having DNA as genetic material
ⓒ Having RNA as genetic material
ⓓ The mode of reproduction
29➤ In viruses, a perfect symmetry is found, due to the presence of protein subunits which are called:
ⓑ Capsomere
ⓒ Tail
ⓓ Core
30➤ Animal viruses enter the host cell through the process of:
ⓑ Viropexis
ⓒ Pinocytosis
ⓓ Elimination
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