NEET 2023 Manipur question paper with solutions

1. Check statement A.

Given that the genetic code reads the same combinations only in one specific direction and does not read identically backward, the code is not palindromic.

Hence, statement A is incorrect.

2. Check statement B.

Since UGA is actually one of the three stop codons that signal the end of translation, it does not act as an initiator codon.

Hence, statement B is incorrect.

3. Check statement C.

Given that each codon codes for only one specific amino acid and does not code for multiple different amino acids, the genetic code is indeed unambiguous and specific.

Hence, statement C is correct.

4. Check statement D.

Since the same codon specifies the same amino acid across almost all organisms, from bacteria to humans, the code is described as nearly universal.

Hence, statement D is correct.

Conclusion: The correct statements are C and D, so the answer is D.

1. Recall the first sub-stage of prophase I.

Given that chromosomes must first become visible before anything else can happen, Leptotene (D) is the first sub-stage, where chromatin begins to condense.

2. Recall the second sub-stage.

Since homologous chromosomes must pair up before crossing over can happen, Zygotene (A) follows, where synapsis forms bivalents (tetrads).

3. Recall the third sub-stage.

Given that the synaptonemal complex is now fully formed, Pachytene (B) is next, where crossing over actually occurs between non-sister chromatids.

4. Recall the fourth sub-stage.

Since the synaptonemal complex must dissolve for chromosomes to begin separating, Diplotene (E) follows, where chromosomes separate but stay joined at chiasmata.

5. Recall the final sub-stage.

Given that the chiasmata must move toward the chromosome ends before the nuclear membrane breaks down, Diakinesis (C) is the last sub-stage.

So, the full order is:

$$D \rightarrow A \rightarrow B \rightarrow E \rightarrow C$$

Hence, the answer is Option C.

1. Recall what aestivation means.

Aestivation refers to the way sepals or petals are arranged relative to one another in a floral bud, and it has several types: valvate, twisted, imbricate, and vexillary.

2. Recall the definition of valvate aestivation.

In valvate aestivation, the sepals or petals in a whorl just touch each other at the margins without overlapping.

3. Apply this to Calotropis.

In Calotropis, the petals/sepals meet edge to edge without overlapping, which is the defining feature of valvate aestivation.

4. Eliminate the other options using their typical examples.

Imbricate aestivation is seen in Cassia, twisted aestivation is seen in China rose, and vexillary aestivation is seen in Pea — none of these match Calotropis.

Hence, the answer is option A: Valvate.