GATE Botany online test series paper 2
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Question 1 of 20
Transmission Electron Micrograph of fungal cell can usually be distinguished from plant cell due to lack of P and having less abundant Q. Find the correct combination of P and Q.Correct
Question 2 of 20
Identify the CORRECT answer
RNA interference (RNAi)
P. is an event of post transcriptional gene silencing
Q. works through RNA induced silencing complexCorrect
Question 3 of 20
Find the odd one outCorrect
Question 4 of 20
Plantibody is theCorrect
Question 5 of 20
In a typical oil-seed crop, the matured seeds are enriched withCorrect
Question 6 of 20
Match the following products (Column I) with the corresponding plant species (Column II )
Column I Column II
P. Saffron 1. Garcinia sp.
Q. Gamboge 2. Rocella tinctoria
R. Litmus 3. Crocus sativus
S. Turmeric 4. Curcuma sp.Correct
Question 7 of 20
The semi-dwarf trait of corn, wheat and rice plants used in breeding program during 1960s resulted in green revolution. Later this ‘green-revolution gene’ has been identified to be involved in either signal transduction pathway or biosynthesis ofCorrect
Question 8 of 20
In classical model to explain the plant-pathogen interaction, the host will not develop the disease upon the pathogen attack whenCorrect
Question 9 of 20
Select the CORRECT combination from the promoter (Column I), transcription machinery used (Column II) and target tissue type (Column III) to express a foreign gene in a plant system.
Column I Column II Column III
P. Ubiquitin 1. Chloroplast i. Leaf
Q. Napin 2. Nucleus ii. Seed
R. RbcL 3. Mitochondria
Question 10 of 20
In a plant species, flower colour purple is dominant over white. One such purple-flowered plant upon selfing produced 35 viable plants, of which 9 were white-flowered and the rest were purpleflowered.What fraction of these purple-flowered progeny is expected to be pure purple-flowered
Question 11 of 20
Match the nuclei status of mutant plant (Column-I) with the typical chromosome number (Column- II), when the wild type plant species is having 2N = 46 chromosomes.
P. Trisomic 1. 23
Q. Triploid 2. 45
R. Monosomic 3. 47
S. Monoploid 4. 69Correct
Question 12 of 20
Match the following reporter genes used in plant transformation experiments with the source of gene and detection/assay system Reporter gene Source of gene Detection/assay
P. β-glucuronidase 1. Aequorea victoria i. Radioactive assay
Q. Green fluorescence protein 2. Photinus pyralis ii. Fluorimetric
R. Luciferase 3. E. coli iii. Fluorescence
S. Chloramphenicol acetyl transferase iv. LuminescenceCorrect
Question 13 of 20
Find the CORRECT statements in the context of Global warming effect on plant photosynthesis.
P. Decreasing aqueous solubility of dissolved CO2 compared to dissolved O2
Q. Decreasing oxygenase activity of Rubisco relative to carboxylation
R. Enhancing the ratio of CO2 to O2 in air equilibrated solution
S. Increasing photorespiration relative to photosynthesisCorrect
Question 14 of 20
Statements given below are either TRUE (T) or FALSE (F). Find the correct combination.
P. Regulation of cell cycle progression depends on cyclin dependent kinase (CDK) and protease activity.
Q. In photosynthesis, oxidation of water produces O2 and releases electrons required by photosystem I (PSI).
R. Photorespiratory reaction occurring in oxidative photosynthetic carbon (C2) pathway involves a cooperative interaction among three organelles: chloroplast, peroxisome and mitochondria.
S. Ethylene acts as a promoter of senescence and cytokinins act as a senescence antagonist.Correct
Question 15 of 20
Match the definition (Column I) with the type of plant community (Column II)
Column I Column II
P. The process of occupation of a particular area by different plant communities from their birth to maturity 1. Formation
Q. A major ecological unit of vegetation 2. Consociation
R. A smaller unit of plant association 3. Faciation
S. A subdivision of plant association which is related to minor differences in temperature and moisture relations 4. Plant successionCorrect
Question 16 of 20
Nuclear membrane is absent inCorrect
Question 17 of 20
An organized and differentiated cell having cytoplasm but no nucleus is found inCorrect
Question 18 of 20
Double haploids in plants can be induced byCorrect
Question 19 of 20
Which of the following techniques in not applicable for evaluating the expression of transgene?Correct
Question 20 of 20
Which of the following reduces the the transpiration rate when applied to aerial parts of plants?Correct