Practice MCQ Questions and answers on Biology-GK

The horizonatally growing hyphae of Rhizopus are called stolons.

Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa.

It is estimated that 2.3 kilograms of alga Chlorella pyrenoidosa produce enough oxygen to supply one man is space.

The locomotory organs of amoeba are called pseudopodia, which means 'fake feet'.

Both, plant cells and bacteria contain cell wall surrounding the cell membrane. Therefore, bacteria is said to be more like plant cell than animal cell.

Kelps is obtained from marine brown algae.

Blue-green Algae, now known as Cyanobacteria, are named for the blue-green pigment phycocyanin which along with chlorophyll a gives them a blue-green appearance. In the marine environment some Cyanobacteria trap and bind together sediment while they simultaneously precipitate carbonate.

There are many similarities between cyanobacterium and bacterium. They both posses saparophytic mode of life. They both lack true cell organelles. They both posses nucleoid instead of true nucleus. In both bacteria and blue green algae, the cell wall is made up of muramic acid and diaminopimelic acid. Thus, the correct answer is 'Muramic acid.'

A liver fluke is a parasitic worm. Infections in humans usually occur after eating contaminated raw or undercooked freshwater fish or watercress. After liver flukes have been ingested, they travel from your intestines to your bile ducts in your liver where they then live and grow.
Hence D is the correct answer.

Most bacteria reproduce by binary fission.