The bottom loop of the tRNA cloverleaf model is the 'Anticodon loop'. It contains a sequence of three bases that physically bind to the complementary mRNA codon during translation.
This statement is FALSE. The complete separation and movement of homologous chromosomes to opposite poles happens during Anaphase I, not Diakinesis. Diakinesis is marked by the terminalization of chiasmata.
Q3. Match List-I (Evolutionary Concept / Theory) with List-II (Key Proponent): List-I A. Inheritance of Acquired Characters B. Theory of Natural Selection C. Mutation Theory List-II 1. Hugo de Vries 2. Jean-Baptiste Lamarck 3. Charles Darwin
Lamarck proposed the use and disuse of organs (acquired characters). Darwin and Wallace proposed Natural Selection. Hugo de Vries proposed the Mutation theory based on his work with Evening Primrose.
Q4. In molecular biology, which highly specialized enzyme catalyzes the formation of a phosphodiester bond between the 3'-OH end of one Okazaki fragment and the 5'-phosphate end of another during DNA replication?
Q5. Assertion (A): The classic Mendelian Test Cross is performed by crossing an F1 individual with an individual having a homozygous dominant genotype. Reason (R): The test cross is strictly used to determine whether a dominant phenotype is homozygous or heterozygous.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
A) A เคเคฐ R เคฆเฅเคจเฅเค เคธเคคเฅเคฏ เคนเฅเค เคเคฐ R, A เคเคพ เคธเคนเฅ เคธเฅเคชเคทเฅเคเฅเคเคฐเคฃ เคนเฅ
B) A เคเคฐ R เคฆเฅเคจเฅเค เคธเคคเฅเคฏ เคนเฅเค เคฒเฅเคเคฟเคจ R, A เคเคพ เคธเคนเฅ เคธเฅเคชเคทเฅเคเฅเคเคฐเคฃ เคจเคนเฅเค เคนเฅ
C) A เคธเคคเฅเคฏ เคนเฅ เคฒเฅเคเคฟเคจ R เค เคธเคคเฅเคฏ เคนเฅ
D) A เค เคธเคคเฅเคฏ เคนเฅ เคฒเฅเคเคฟเคจ R เคธเคคเฅเคฏ เคนเฅ
Answer: (D)
The Assertion is FALSE. A test cross involves crossing an individual of unknown genotype with a homozygous RECESSIVE parent, not a homozygous dominant one. The Reason statement is completely correct.
Q6. Based on the provided image of the Miller-Urey experiment apparatus, what did the sparking electrodes in the indicated spherical flask physically simulate in the context of the origin of life?
A) Volcanic eruptions
B) Intense solar ultraviolet (UV) radiation
C) Lightning storms in the primitive Earth's atmosphere
Stanley Miller and Harold Urey used electrical sparks to simulate the frequent and intense lightning storms of the primitive, reducing atmosphere, providing the necessary activation energy to form amino acids.
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