MCQ
Part-II Graduation Standard: MCQ - Practice Questions with Answers
Solve 399 Part-II Graduation Standard: questions for RAS/RPSC preparation.
Practice questions
Q1Parthenocarpy in a flowering plant refers to the development of
Parthenocarpy is fruit development without fertilization. Because fertilization and seed formation are bypassed, parthenocarpic fruits are generally seedless; this trait may occur naturally or be induced by growth regulators.
Q2Which feature combination best separates Annelida from Nematoda in a class-level taxonomy question?
Annelids are the segmented worms; their body shows true metamerism and a coelomate plan. Nematodes may look worm-like, but they are unsegmented and pseudocoelomate. This contrast is a common trap because both groups include elongated worm forms but belong to different structural grades.
Q3Which environmental condition will generally increase the rate of transpiration, provided stomata remain open?
The rate of transpiration depends strongly on the vapour gradient and stomatal aperture. Light tends to open stomata for photosynthetic gas exchange, so water vapour escapes faster than in darkness, while high humidity and stomatal closure have the opposite effect.
Q4Which set of characters will most reliably identify Asteraceae in a floral diagram-based question?
Asteraceae is also called Compositae because many small florets are packed into a capitulum or head, commonly surrounded by involucral bracts. The androecium is syngenesious, and the fruit is a cypsela, often associated with a pappus. These features separate it sharply from Fabaceae, Malvaceae and Euphorbiaceae.
Q5The ancient Indian mastery of zinc production is best identified by which technological feature?
Zinc is difficult to obtain as a metal because it vaporizes at furnace temperatures and can reoxidize. Indian zinc metallurgy is noted for using reduction-distillation arrangements with retorts and condensers, a practical chemical solution that distinguishes it from unrelated modern electrolysis or petroleum processes.
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6During DNA replication, why is an RNA primer required before DNA polymerase can extend a new strand?
7In the classification of medicines, which statement best describes antihistamines?
8For a uniformly charged solid sphere of radius R and total charge Q, the electric potential is taken zero at infinity. What is the potential at a point r < R?
9A root transverse section has many xylem bundles, a conspicuous pith, and no evidence of cambial activity or secondary tissues. Which conclusion is most defensible?
10A cobalt(III) ammine chloride compound of empirical composition CoCl3.5NH3 gives two moles of AgCl per mole of compound with excess AgNO3. Which Werner formula is consistent with this observation?
11In Drosophila, which genotype is expected to follow the female developmental pathway on the basis of the X-to-autosome ratio?
12In many phosphoryl-transfer enzymes, the biologically active substrate is better represented as Mg-ATP rather than free ATP. Which role of Mg2+ best explains this requirement?
13Which sequence arranges the given polymers in increasing strength of intermolecular forces, using the usual exam-level classification of elastomer, thermoplastic, and fibre?
14Which statement is correct about the reproductive condition of an earthworm?
15A parallel-plate capacitor is charged by a battery to V and then disconnected. A dielectric slab of relative permittivity K fully fills the gap. Which pair correctly describes the final potential difference and stored energy?