In plant anatomy, the 'Vascular cambium' is a lateral meristem responsible for secondary growth (increase in girth) in dicots and gymnosperms. It produces secondary xylem (wood) towards the: MCQ with Answer and Explanation
In plant anatomy, the 'Vascular cambium' is a lateral meristem responsible for secondary growth (increase in girth) in dicots and gymnosperms. It produces secondary xylem (wood) towards the:
A. Upwards only
B. Both inside and outside equally
C. Inside (center)
D. Outside (periphery)
Answer: Option C
Solution (By JKExamLibrary)
The vascular cambium is a thin layer of meristematic cells located between the primary xylem and primary phloem in the vascular bundles of dicot stems and roots, and in the secondary vascular tissue. It is a lateral meristem that divides periclinally (parallel to the surface). It produces secondary xylem (wood) cells towards the inside (center) of the stem or root, and secondary phloem (inner bark) cells towards the outside (periphery). Since it produces xylem much faster than phloem, the secondary xylem accumulates and forms the bulk of the wood.
Explanation:
Transcriptomics studies the complete set of RNA transcripts (transcriptome) produced by the genome under specific conditions. It often uses microarrays or RNA-seq. Genomics is DNA, proteomics proteins, metabolomics metabolites.
Explanation:
DNA polymerase catalyzes the formation of phosphodiester bonds between adjacent nucleotides, extending the new strand complementary to the template. Helicase unwinds DNA, ligase joins fragments, primase synthesizes RNA primer. In prokaryotes, DNA polymerase III is the main replicative enzyme.
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