Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What is the function of tassels in the corn cob?
Tassels are the male inflorescence; they release/disperse pollen. (NEET key.)
The reaction centre in PS II has an absorption maxima at:
P680 — PSII reaction centre chlorophyll absorbs at 680 nm.
In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as:
Mature cells regaining ability to divide → dedifferentiation (callus formation).
A: The first stage of gametophyte in the life cycle of moss is protonema stage. R: Protonema develops directly from spores produced in capsule.
Protonema (filamentous gametophyte) develops from capsule spores; both statements true.
Among eukaryotes, replication of DNA takes place in:
DNA replication occurs in the Synthesis (S) phase of interphase.
Axile placentation is observed in:
Axile placentation: China rose, Petunia, Lemon, Tomato (Tomato is also axile but Dianthus has free-central).
In the equation $GPP - R = NPP$, $R$ here is:
NPP = GPP − Respiratory loss (energy used by plant for respiration).
Which of the following stages of meiosis involves division of centromere?
Centromeres split and sister chromatids separate in Anaphase II.
Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?
GA accelerates maturity in conifers, hastening early seed production.
Unequivocal proof that DNA is the genetic material was first proposed by:
Hershey-Chase blender experiment (1952) — unequivocal proof.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.