Consider statements about genetics: 1. DNA is transcribed into mRNA. 2. mRNA is translated into protein. 3. tRNA carries amino acids to the ribosome. Which are correct? MCQ with Answer and Explanation
Consider statements about genetics: 1. DNA is transcribed into mRNA. 2. mRNA is translated into protein. 3. tRNA carries amino acids to the ribosome. Which are correct?
A. 2 and 3 only
B. 1 and 3 only
C. 1 and 2 only
D. 1, 2 and 3
Answer: Option D
Solution (By JKSSB Mock Tests)
Transcription is the process where the genetic information in a DNA sequence is copied into a complementary messenger RNA (mRNA) molecule by RNA polymerase. Translation is the process where the mRNA sequence is decoded by ribosomes to synthesize a specific polypeptide (protein). Transfer RNA (tRNA) molecules act as adapters, carrying specific amino acids to the ribosome based on the mRNA codon. All statements are correct.
Explanation:
In monocotyledonous plants like grasses, the primary tap root formed from the radicle is short-lived and aborts early. It is subsequently replaced by a large number of fibrous roots that arise adventitiously from the base of the stem. This forms a fibrous root system. Mustard, peepal, and carrot exhibit a tap root system derived from the primary root.
Explanation:
Testosterone, produced by Leydig cells in the testes, promotes development of male characteristics like facial hair, deepening of voice, and muscle growth. It also regulates spermatogenesis.
Explanation:
RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) is the most abundant protein on Earth and the key enzyme in the Calvin cycle (C3 pathway). It catalyzes the fixation of CO2 by attaching it to Ribulose-1,5-bisphosphate (RuBP) to form a 6-carbon intermediate that immediately splits into two molecules of 3-PGA.
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