NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 93 of 104)
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- Nucleosome is an ellipsoidal bead-like structure with a length of 110 A ‘and a diameter of 65 to 75 A’ Its core consists of an octamer of his tones and its surface is surrounded by a super-helical strand of DNA of about
- 110 base pairs
- 140 base pairs
- 210 base pairs
- 265 base pairs
- The plastids which are filled with a large amount of lipids are called
- Etiolates
- Elastoplasts
- Leucoplasts
- Amyloplasts
- Some cellular structures are bound by single or double membranes while some others are without a membrane. Match the organdies in List I with the nature of membranes in List II 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 93 of 104) List-I List-II - Mitochoridria
- Lysosornes
- Rlbosomes
- Nucleus
- Without membrane
- Single membrane
- Double membrane
- A
- B
- C
- D
- 1
- 2
- 3
- 2
- 3
- 1
- 2
- 1
- 3
- 2
- 1
- 3
- 2
- 3
- 1
- 3
- Is chromosomes are formed by
- Pairing of identical chromosomes
- Longitudinal splitting of Centro mere
- Transverse division of Centro mere
- Disjunction of bivalents
- The formation of multivalent at meiosis in a diploid organism is due to
- Inversion
- Deletion
- Monosomy
- Reciprocal translocation
- Which one of the following is known to act as a biological mutagen?
- Acridine orange
- Nitrosoguanidine
- Transposon
- Streptomycin
- Match List I with List II 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 93 of 104) List-I List-II - Autotetraploid
- Ac-Ds system
- Segmental allopolyploid
- Genetic Cinderella
- Triticum aestivum
- Drosophila melanogaster
- Secale cereale
- Zea mays
- A
- B
- C
- D
- 3
- 4
- 1
- 2
- 2
- 1
- 4
- 3
- 3
- 1
- 4
- 2
- 2
- 4
- 1
- 3
- Gene dosage depends upon the
- Total number of genes
- Ploidy level of the species
- Frequency of induced mutations
- Number of chromosomes involved in reciprocal translocations
- Match List I with List II 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 93 of 104) List-I List-II - Failure of spindle to organize
- Dissolution of cell wall
- Fusion of plant protoplasts
- Induction of mutation
- Nitrous acid
- Cellulase
- Coichicine
- PEG
- A
- B
- C
- D
- 3
- 2
- 4
- 1
- 3
- 2
- 1
- 4
- 2
- 3
- 4
- 1
- 2
- 3
- 1
- 4
- When a pyramiding base is replaced by a purine or vice-versa in the DNA polynucleotide chain, the process is known as
- Transmutation
- Tran version
- Translocation
- Transfect ion
- Two genes a and b present on the same chromosome show 12% recombination. The distance between them is
- 0.12 map units
- 1.2 map units
- 12 map units
- 120 map units
- RFLP (Restriction Fragment Length Polymorphism) study is a technique for
- Transferring genes from unrelated species
- Isolating single genes
- Isolating single genes products
- Identifying genetic (DNA) homologies
- Consider the following statements regarding linkage:
- The linked genes are located on the same chromosome.
- Crossing over between linked genes is rare.
- Linked genes are always inherited together.
- Linkage affects the percentage of homozygosis following hybridization.
- Of these statements
- 1 and 3 are correct
- 1 and 2 are correct
- 2,3 and 4 are correct
- 1,3 and 4 are correct
- He erotic effect in a hybrid is due to
- Over dominance at most loci
- Non-allelic interaction
- Inter-allelic interaction
- Additive genes effects
- Expression of a recessive phenotype in a deletion heterozygote is due to
- Pseudo-dominance
- Partial-dominance
- Super-dominance
- Co-dominance