VITEEE: Subject Wise and Full Length VITEEE PCBE Mock Test - 2 Free Online

Bacteriophages, which are viruses that infect bacteria, typically contain double-stranded DNA. In contrast, the majority of viruses that infect plants usually carry single-stranded RNA. This structural difference in genetic material is significant for their replication processes and host interactions, making Option C the correct answer. Option A is incorrect as bacteriophages infect bacteria, not animals. Option B is incorrect because all viruses, including bacteriophages, contain genetic material either DNA or RNA. Option D is incorrect as neither bacteriophages nor plant viruses are considered living organisms in traditional biological classifications.

ICBN (International Code of Botanical Nomenclature) is one of the codes of nomenclature which is independent of zoological and bacteriological nomenclature. The foundations of ICBN were found in Philosophia Botanica, a book written by C. Linnaeus.

Assertion A is true as slime molds indeed form fruiting bodies to disperse spores. Reason R is also true and is the correct explanation for A because the ability of spores to survive extreme conditions is crucial for the effective dispersal and lifecycle continuation of slime molds in varying environmental conditions.

Solanum, Panthera, Homo are examples of Genera.
Example:

1. Potato → Genus: Solanum; 
   Species: tuberosum
2. Human → Genus: Homo;
   Species: sapiens
3. Lion → Genus: Panthera; 
   Species: leo

Hence, the Correct Answer is C

NCERT Reference: Topic “Genus” from Chapter "The Living world" of NCERT

• A virus is a small collection of genetic code, either DNA or RNA, surrounded by a protein coat. A virus cannot replicate alone. Viruses must infect cells and use components of the host cell to make copies of themselves.
• All viruses are nucleoproteins (Nucleic acid + Protein) in the structure. The nucleic acid (DNA and RNA) is the genetic material.
• In a particular virus, either DNA or RNA is genetic material never both are present in a virus.
• Single-stranded RNA or ssRNA - Tobacco mosaic virus (TMV) Virus envelope is known as capsid. The capsid is composed of protein subunits called capsomeres.

Hence, the correct option is A

NCERT Reference: Page no. 26 of topic “2.6 VIRUSES, VIROIDS, PRIONS AND LICHENS” of chapter 2 of NCERT

Coelenterates have radial symmetry. Aschelminthes are pseudocoelomates. Molluscs do not show metamerism. Sponges are diploblastic.

Angiogram is an X-ray diagnostic procedure used to visualize the blood vessels following injection of a contrast 16 substance into an artery. Coronary angiography is used to
detect obstruction in the coronary arteries, due to presence of atherosclerotic plaques which can lead to heart attack, To clear the passage, a very small balloon tipped catheter is inserted into the coronary artery under X-ray observation, Then the balloon is inflated with air to destroy the plaques, thereby clearing the lumen of the blood vessel for blood flow, This procedure is known as coronary artery angioplasty.

China rose flowers are – Actinomorphic – Hypogynous – Twisted aestivation

(a) True. In the roots of many plants, the vascular bundles are arranged radially, where xylem and phloem are alternately positioned along different radii.

(b) True. Conjoint closed vascular bundles are those where cambium is absent. These are typically found in monocots.

(c) True. In open vascular bundles, cambium is present between xylem and phloem. This cambium is meristematic tissue that allows for the secondary growth of the plant by adding layers to xylem and phloem.

(d) True. In the vascular bundles of dicotyledonous stems, the protoxylem (the first-formed xylem) is oriented towards the center, which is known as endarch.

(e) True. Monocotyledonous roots often feature a polyarch condition, where there are multiple (usually more than six) xylem bundles.

Depolarization of the axonal membrane happens due to an increase in Na⁺ permeability, which allows Na⁺ ions to rapidly enter the axoplasm, making Statement A correct. Statement B is also correct, as the diffusion of K⁺ out of the membrane restores the resting potential. Statement C is incorrect because the sodium-potassium pump moves 3 Na⁺ out for every 2 K⁺ in, not the other way around. Hence, the correct statements are A and B.
Topic in NCERT: Generation and Conduction of Nerve Impulse.
Line in NCERT: "The rise in the stimulus-induced permeability to Na* is extremely short-lived. It is quickly followed by a rise in permeability to K*. Within a fraction of a second, K+ diffuses outside the membrane and restores the resting potential of the membrane at the site of excitation and the fibre becomes once more responsive to further stimulation."

Topic in NCERT: NEURON AS STRUCTURAL AND FUNCTIONAL UNIT OF NEURAL SYSTEM
Line in NCERT: " A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon."

Basal body is also known as a modified centriole which serves both to create and connect the cilia and flagella to the cell.