NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 47 of 104)
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- Living organisms contain only
- L-amino acids and L-sugars
- L-amino acids and D-sugars
- D-amino acids and D-sugars
- D-amino acids and L-sugars
- 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 47 of 104) List-I List-II - DNA Structure
- Semi-conservative replication of DNA
- One gene, one enzyme theory
- Induction of mutation
- N⟋A
- N⟋A
- N⟋A
- N⟋A
- A
- B
- C
- D
- 1
- 2
- 3
- 4
- 3
- 4
- 1
- 2
- 3
- 4
- 2
- 1
- 4
- 3
- 2
- 1
- Cultivated tobacco, Nicotine tobacco has 2n = 48 chromosomes and is amphidiploids.Nicotine Sylvester՚s which one of the progenitors of Nicotine tobacco has 2n = 24 chromosomes and is diploid. It has contributed one genome to Nicottama tobacco. When these two species are hybridized, the critical chromosomal associations at meiosis in the hybrid will be
- 24 bivalents
- 12 univalent
- 12 bivalents
- 12 bivalents + 12 univalent
- A chromosome carrying the Centro mere at one of the ends is called
- Met centric
- Telemetric
- Apocentric
- Acenthc
- What could be the number of phenotypic classes expected from a testcross of Aa Bb Cc hybrid?
- 16
- 12
- 8
- 4
- Which one of the following statements correctly defines the term autotrophic mutants?
- Mutant cells capable of synthesizing essential growth actors form the minimal medium
- Mutant cells unable to grow in the presence of axon
- Mutant cells incapable of producing one or two growth actors essential for growth.
- Mutant cells resistant to a drug
- The simplest way to determine the genotypes of the offspring of a cross is to use
- Pedigree chart
- Punnett square
- Generation chart
- Gene linkage
- Duplication of chromosomes without cell or nuclear division gives rise to the condition of
- Polyploidy
- Politely
- Haploid
- Diploid
- Triticale is the first man-made cereal crop. The combination of parents involved in its production is Tritium
- Sorghum
- Barely
- Saccharin
- Rye
- In 1969, Eric Davidson and Ray Britten proposed a model for DNA organization in Eukaryotes. One of the main features of their model is the existence of
- Cytoplasm genes
- Split genes
- Repetitive DNA
- Overlapping genes
- Which one of the following chromosome combinations is expected in an offspring obtained after selling a plant having AABBCCDD homologues pairs?
- AAAABBBBCCCCDDDD
- AA BB CC D
- AA BB C D
- AA BB C D
- Which one of the following plant breeding technologies or concepts has mostly contributed to the much acclaimed green revolution?
- Heterosis
- Male sterility
- Dwarf plant type
- Genetic engineering
- The distance between two nitrogen bases in a polynucleotide of DNA is
- 34.00A ′
- 10.4A ′
- 6.4A ′
- 3.4A ′
- Which one of the following molecular components associations is the essentially required one for protein synthesis in the cytoplasm of a cell?
- mRNA + rRNA + tRNA + DNA
- mRNA + rRNA + tRNA + an amino acid
- mRNA + polysomes + tRNA + protein bodies
- mRNA + tRNA + sRNA + protein bodies
- Which one of the following genetic units moves from one chromosome to another or from one replica to another and causes genetic changes?
- Muto0n
- Replicon
- Cistron
- Transpose