Class 11 Biology Model Paper 3 MCQs Test

The diagram shows the flow of blood in various parts of the body. Identify the portal vein.

This graph shows the effect of temperature on the rate of reaction of an enzyme-catalyzed reaction. Mention the point of the graph that shows the optimum temperature.

We have 1 billion bacteria per square centimeter of our skin. Why do we have so many bacteria on our skin?

The diagram shows a dicot seed opened. Select the part that is impenetrable and prevents germ growth.

"P" are organelles produced in a rounded structure "Q" found in the nucleus of eukaryotic cells and then pass through "R" into the cytoplasm to provide a site for the synthesis of "S". What does "R" indicate in the above statement?

Why Z scheme temporarily shifts to a cyclic pathway during the light reaction?

All organ systems are less developed in parasitic flat worms EXCEPT:

The diagram shows four levels of protein structure. Select the level that depends on disulfide bridges for stability.

Transmission of Viral hepatitis is through different routes. Identify the correct option among the following.

The ascent of sap depends on four factors according to TACT theory. Choose the pair of factors that depend on the hydrogen bonding of water?

The given diagram represents the entry of food particle “K” in the trachea.

Which one of the following reasons could be responsible for the entry of particle “K” into the larynx instead of oesophagus?

During the secretion of Insulin from the Pancreas, which route is it most likely to take?

Water potential (Ψw), solute potential (Ψs), and pressure potential (Ψp) are interrelated with each other. If Ψw=-1500 KPa and Ψs= -2100 KPa, then Ψp will be:

Which molecule is ketohexose?

The diagram shows bacteria surrounded by antibodies. Which parts are antigens?

The filaments of some fungi are coenocytic, which means they:

The process of chemiosmotic phosphorylation depends on proton pumps. Pick the row that shows the components of ETC that pump H+ to generate ATP.