GATE Botany online test series paper 1
of 20 questions completed
Click on Start Quiz button to take the Online test. Below are some articles to help you prepare for GATE exams.
You can install GATE Mobile App for unlimited online tests with answers.
Read my article on GATE exams for details of exam (eligibility criteria, format etc) and also post your questions or doubts.
Online tests and Books
My article on GATE Life Sciences provides details to crack the exam with ease ( free online tests, recommended books, detailed syllabus).
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
of 20 questions answered correctly
Time has elapsed
You have reached of points, ()
- Not categorized 0%
|Table is loading|
|No data available|
Question 1 of 20
The swollen base of a petiole is known asCorrect
Question 2 of 20
An estimate of phylogenetic relationships among the taxa is commonly represented in the form of aCorrect
Question 3 of 20
Parenchyma cells associated with sieve tube members are calledCorrect
Question 4 of 20
Cytoplasmic male sterility via the chloroplast genome can be induced by the expression of Pha A gene encodingCorrect
Question 5 of 20
The number of nucleosomes present in a 30 nm solenoid structure of a chromatin isCorrect
Question 6 of 20
Which one of the following performs normal C3 photosynthesis when water is available, but switches to crassulacean acid metabolism (CAM) during salt or drought stress?Correct
Question 7 of 20
Which one of the following is a free-living photosynthetic nitrogen fixer?Correct
Question 8 of 20
Carbon dioxide and other ‘greenhouse gases’ act byCorrect
Question 9 of 20
Which of the following best represents the flow of energy through an ecosystem?Correct
Question 10 of 20
Which one of the following drugs is obtained from the capsule of Papaver somniferum?Correct
Question 11 of 20
Which of the following statements are TRUE for plant growth regulators?
P. The release of cellulase and polygalacturonase into the cell wall is promoted by abscissic acid
Q. The early biosynthetic steps of gibberellic acid, up to the formation of ent-kaurene take place in the plastid
R. The naturally occurring zeatin belongs to the aromatic group of cytokinins
S. Induction of protease inhibitors as a result of wounding and pathogen attack is activated by jasmonic acidCorrect
Question 12 of 20
Which of the following statements are TRUE for the transposable elements?
P. Barbara McClintock discovered the autonomous and non-autonomous transposable elements in Maize
Q. Variations in flower pigmentation in Antirhinum are due to the presence of transposable elements Ac and Ds
R. The Ac transposable element is 4563 bp long and has an 11 bp inverted repeats
S. Ds produces the transposase and mobilize the Ac elementsCorrect
Question 13 of 20
Which of the following statements are TRUE on transgene approach?
P. T-DNA integration occurs mainly through non-homologous recombination
Q. The Gateway cloning depends on recombination technology as opposed to standard uses of restriction enzymes and DNA ligase
R. The localization of -glucuronidase (GUS) activity as a result of expression of GUS reporter gene can be visualized in a histochemical assay using the X-gal
S. The green fluorescent protein gene (GFP) is isolated from the bacterium Photinus pyralisCorrect
Question 14 of 20
With respect to adhesion and cohesion of stamens, identify the INCORRECT statements.
P. Adnation of stamens to petals is described as epiphyllous stamens
Q. In Calotropis, stamens and carpels are united to form gynostegium
R. In syngenesious stamens, filaments are united to form a bundle while the anthers are free
S. Synandrous stamens found in Cucurbita represent the union of filaments as well as anthersCorrect
Question 15 of 20
Identify the CORRECT statements in plant secondary metabolism.
P. Tropane alkaloids in Atropa belladonna are synthesized from tyrosine
Q. Antioxidative food ingredient rosmarinic acid is obtained from cell suspension cultures of Coleus blumei
R. Thiophenes are produced from hairy root cultures of Tagetes patula
S. Cyanidin, the principal anthocyanin responsible for red color in Rosa hybrida is produced from cinnamaldehydeCorrect
Question 16 of 20
Which of the following statements are TRUE for respiration?
P. The conversion of one molecule of pyruvate to three molecules of CO2 generates four molecules of NADH
Q. Fructose 6-phospate is the principal substrate for glycolysis
R. The oxidation of glucose 6-phosphate to 6-phosphogluconate is the first step in the oxidative pentose phosphate pathway
S. The mitochondrial ‘alternative oxidase’ provides an alternative pathway for transfer of electrons from ubiquinone to oxygen utilizing proton pumping complex of the respiratory chainCorrect
Question 17 of 20
Match the name of the disease with the causal organism.
Disease Causal organism
P. Black rot of sugarcane 1. Cercospora personata
Q. Stem rot of jute 2. Macrophomina phaseolina
R. Tikka disease of groundnut 3. Ceratocystis adiposa
S. Crown gall of grapes 4. Synchytrium endobioticum
5. Agrobacterium tumefaciens
6. Colletotrichum corchorumCorrect
Question 18 of 20
Match the recombinant proteins produced through molecular farming with their applications.
Recombinant proteins Applications
P. Hirudine 1. HIV therapy
Q. Trichosanthin 2. Anticoagulant
R. Somatotrophin 3. Growth hormone
S. beta-Interferon 4. Hypertension
5. Cystic fibrosis
6. Treatment for hepatitis-BCorrect
Question 19 of 20
Plant which grows attached to another plant species but is not a parasitic is known asCorrect
Question 20 of 20
An ideal cybrid should haveCorrect