NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 68 of 104)
Get unlimited access to the best preparation resource for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.
- Which one of the following is a terminator codon?
- AUG
- UGA
- UUU
- UGG
- Match List I (Enzyme) with List II (Function) and select the correct answer using the codes given below the lists:
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 68 of 104) List-I List-II - DNA Ligase
- DNA polymerase
- DNase I
- DNA topoisomerase
- Catalyses the covalent union of segments of an interrupted sugarphosphate strand in double-stranded DNA
- End nuclease that digests either singlestranded or double-stranded DNA
- Produces single or-double-stranded breaks in DNA during replication to release tension brought about by the separation of double-strands
- Catalyses the formation of DNA worn deoxyribonucleotides using one strand bf DNA as template
- A
- B
- C
- D
- 1
- 4
- 3
- 2
- 4
- 1
- 2
- 3
- 1
- 4
- 2
- 3
- 4
- 1
- 3
- 2
- When the dominant alleles (or wild type) say AB are present on one chromosome and its alternative recessive allele (ab) are located on the other homologous chromosome AB⟋ab, then the linkage is said to be in
- Repulsion phase
- Coupling phase
- Neutral phase
- Dominant phase
- Sex determination by environmental factors is commonly observed in
- Drosophila melanogaster
- Melandrium album
- Mirabilis jalapa
- Bonellia viridis
- The absence of Y chromosome in human beings causes
- Turner՚s syndrome
- Klinefelter՚s syndrome
- Down՚s syndrome
- No abnormality
- Directional change in the gene frequency in a panmictic population is due to
- Genetic load
- Genetic code
- Genetic disorders.
- Genetic drift
- Successful exploitation of heterocyst depends upon the
- Presence of he erotic effect in the hybrid
- Availability of male sterility
- Out crossing nature of the flower
- He erotic effect and availability
- Lamp brush chromosomes found in certain organisms are directly related to metamorphosis. Which one of the following statements in this regard i5 incorrect?
- These are very large chromosomes
- These are actively engaged in RNA and protein synthesis and accumulation
- Lamp brush loops recede and these become normal looking chromosomal parts looking chromosomal parts
- They are compactly packed and have very high DNA Content
- The patches of thin-walled parenchyma extending from pith to cortex and lying between the vascular bundles are called
- Resin canals
- Oil ducts
- Modularly rays
- Phloem
- In which one of the following groups of plants would one find vessels in all the plants?
- Selaginella. Marchantia, Cycas, Schizandra
- Selaginella, Gnetum. Mxngfera, Marsilea
- Gnetum, Pinus, Ficus, Polytrichum
- Magnolia, Lycopodium, Funaria
- Azadirachta
- Vessels are absent in which one of the following families of angiosperms?
- Ranunculaceae
- Wmteraceae
- Myrtaceae
- Casuarinaceae
- Cork cells are impervious to water because of the presence of
- Lignin
- Cutin
- Suberin
- Pectin
- C − 3, C − 4 and CAM plant species are found in
- Crassulaceae
- Cactaceae
- Euphorbiaceae
- Poaceae
- Which one of the following branches of botany explains the modern Systematic on the basis of variation and evolution?
- Biosystematics
- Plant taxonomy
- Plant systematic
- Chemosystematics
- The compound pollen grain, massula is characteristic of
- Papilionaceae
- Caesalpiniaceae
- Mimosaceae
- Proteaceac