C++ | MCQs

Explanation

HIV is transmitted through infected blood and hypodermic syringes.

The virus can spread via contaminated needles, blood transfusions, and from mother to child.

It causing immunodeficiency in affected individuals.

Explanation

The example of viruses having a polyhedral capsid with 252 capsomeres is adenovirus.

Adenoviruses are known for their icosahedral structure.

It containing exactly 252 protein subunits called capsomeres.

Explanation

The bacterial genome becomes diploid during binary fission.

Before the cell divides, the bacterial DNA replicates, temporarily creating two copies (diploid-like state) until the cell splits into two daughter cells.

Explanation

Autotrophic mode of nutrition in organisms depends upon the photosynthesis mode.

Autotrophs, like plants and some bacteria, use sunlight to produce their own food by converting carbon dioxide and water into glucose and oxygen.

Explanation

About 70% of carbon dioxide is carried in blood as bicarbonate.

This occurs when carbon dioxide reacts with water, forming carbonic acid, which then dissociates into bicarbonate ions and protons.

It facilitating transport in the bloodstream.

Explanation

According to the endosymbiosis theory, flagella may have derived by the ingestion of prokaryotes similar to spirochete.

This theory suggests that eukaryotic cells may have evolved through symbiotic relationships with engulfed prokaryotic organisms.

Explanation

Temporal bones are included in the paired cranial bones.

Unlike the frontal, vomer, and occipital bones, which are single.

The temporal bones exist in pairs (one on each side of the skull).

Explanation

Smooth muscles possess a uni-nucleate feature.

Unlike striated muscles, smooth muscles are non-striated, involuntary, and have a single nucleus per cell.

Explanation

The chromosomes were first observed by Walther Flemming.

He used a microscope to study cell division and identified chromosomes during mitosis in the late 19th century.

Explanation

Mesosomes are the invagination of bacterial cell structure cell membrane.

They are thought to play a role in cellular processes such as cell division and respiration in prokaryotic cells.