STD 11 - 8. Cell the unit of life — NEET STD 11 Science — Question

Wood is a common name of

During which stage of meiosis, do tetrads line up at the equator?

What will happen if all the bacteria and fungi are destroyed?

A specialised nodal tissue embedded in the lower corner of the right atrium, close to Atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec.
This delay allows -

Assertion: Hybrid seeds have to be produced every year.
Reason: If the seeds collected from hybrids are sown, the plants in the progeny will segregate and do not maintain hybrid characters.

Identify Bryophyte ,

Identify the plant parts whose transverse section shows a clear and prominent pith.

Coenzyme can function

Which of the following statements are correct regarding transcription ?
(i) rRNAs plays structural and catalytic role during translation.
(ii) There is single DNA-dependent RNA polymerase that catalyses transcription of all types of RNA in bacteria.
(iii) RNA polymerases are able to catalyse all the three steps of transcription i.e., initiation, elongation and termination.
(iv) The RNA polymerase is only capable of catalysing the process of elongation.
(v) Many times the translation can begin much before the mRNA is fully transcribed in bacteria, so transcription and translation can be coupled in bacteria.
(vi) In eukaryotes, there are at least three types of RNA polymerases in the nucleus.
(vii) In eukaryotes, the primary transcripts called hnRNA contain both the exons and the introns and are non-functional.