NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 52 of 104)
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- Which one of the following gymnosperms is devoid of arch gonium?
- Pinus
- Ginkgo
- Genetum
- Cycas
- Which one of the bacteria is not connected with nitrogen fixation?
- Azotobacter
- Nitrosomonas
- Clostridium
- Rhizobium
- Consider the following statements:
- Anthoceros has isomorphic alternation of generations and saprophyte is green
- Riccia has heteromorphy alternation of generations and its saprophyte is non-green
- Which of the statements given above isāare correct?
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
- Which one of the following pairs of plants bears sporangia with two different types of spores?
- Selaginella and Equisetum
- Equisetum and Pteridium
- Selaginella and Marselia
- Pteriodium and Marselia
- In Autocross, the sporangium tissue develops from
- ApotheciumÕs
- EndotheciumÕs
- Amphithecium
- Perithecium
- In Eusporangiate ferns, the sporangium is derived from a group of
- Apical meristems
- Lateral merstems
- Intercalary cells
- Surface cells of sporophyll
- Consider the following characteristic features of plants:
- Naked ovules
- Double fertilization
- Absence of tracheids
- Haploid endosperm
- Which of the above are present in the case of gymnosperms?
- 1 and 4
- 1 and 3
- 1 and 2
- 2 and 4
- In photosynthesis, during the operation of PS II, the cited P680 is rapidly photooxidised as it passes an electron
- Carotene
- Ferridoxin
- Phaeophytin
- Phycoerythrin
- Consider the following statements:
- PEP Carboxylase has a high specificity for carbon dioxide and it never picks up oxygen
- Kranz anatomy and C4 metabolism are found in only monocots of hot climates and not in dicots
- Which of the statements given above isāare correct?
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
- Uncouples such as 2,4-Dinitrophenol have no effect on
- Oxidative phosphorylation
- Photophosphorylation
- Substrate-level phosphorylation
- Respiratory-chain phosphorylation
- With reference to mass selection of crop plants, consider the following statements:
- Mass selection has been more commonly used for the improvement of cross-pollinated crops than the single plant selection
- The purpose of mass selection is to increase the frequency of superior genotypes in the population
- This method of breeding has been very effective in improving characters governed by many genes
- Which of the statements given above are correct?
- 1,2 and 3
- 1 and 2
- 1 and 3
- 2 and 3
- In the mitochondrial genome of Neurospora crassa the genetic code UGA means
- Tryptophan
- Methiorne
- Isoleucine
- Terminationāstop codon
- A shuttle vector is defined as
- A plasmid capable of replicating in one orgasm
- A plasmid capable of accepting only large DNA inserts
- A plasmid incapable of replicating in cells
- A plasmid capable of replicating in two different organisms
- The replication of a single stranded viral RNA is brought about by
- Reverse transcriptase
- RNA polymerase
- DNA ligase
- DNA primer
- Three point test cross is used for
- Gene transfer
- Gene regulation
- Gene conversion
- Gene mapping