Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions for Biology

______ and ______ pairs of ribs are called floating ribs.

The human cranium is made of ______ bones.

In an inflorescence where flowers are borne laterally in an acropetal succession, the position of the youngest floral bud in the floral axis shall be ______.

Are chemosynthetic bacteria-autotrophic or heterotrophic?

Holdfast, stipe and frond constitutes the plant body in case of ______.

Food is stored as Floridean starch in Rhodophyceae. Mannitol is the reserve food material of which group of algae?

Product of photosynthesis is transported from the leaves to various parts of the plants and stored in some cell before being utilised. What are the cells/ tissues that store them?

While eating peach or pear it is usually seen that some stone like structures get entangled in the teeth, what are these stone like structures called?

Below is a list of plant fibres. From which part of the plant these are obtained

Coir

Write the function of:

Collenchyma

Write the function of:

Aerenchyma

The following terms has some anatomical significance. What do these terms mean? Explain with the help of line diagrams.

Secondary wall

Select one which is not true for ribosome.

Which one of these is not a eukaryote?

Which of the following features is common to prokaryotes and many eukaryotes?

Which of the following is not true of a eukaryotic cell?

What are plasmids? Describe their role in bacteria?

Is extra genomic DNA present in prokaryotes and eukaryotes? If yes, indicate their location in both the types of organisms.

The genomic content of the nucleus is constant for a given species where as the extra chromosomal DNA is found to be variable among the members of a population. Explain.

When you take cells or tissue pieces and grind them with an acid in a mortar and pestle, all the small biomolecules dissolve in the acid. Proteins, polysaccharides and nucleic acids are insoluble in mineral acid and get precipitated. The acid soluble compounds include aminoacids, nucleosides, small sugars etc. When one adds a phosphate group to a nucleoside, one gets another acid soluble biomolecule called ______.