HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Biology (Botany and Zoology)

Identify the correct statement.

1. Sulphur is essential for amino acids Cystine and Methionine.
2. Low level of N, K, S and Mo affect cell division.
3. Non-leguminous plant Alnus which contain bacterium Frankia.
4. Denitrification carried out by nitrosomonas and nitrobac.

Nitrogen is present in the atmosphere in huge amounts but higher plants fail to utilize it. Why?

Where will you place the plants which contain two cotyledons with cup shaped thalamus?

Explain the insectivorous mode of nutrition in angiosperms?

The correct sequence of flow of electrons in the light reaction is ______.

What is the name of alternate way to glucose breakdown? Explain the process in involved in it?

For every CO₂ molecule entering the C₃ cycle, the number of ATP & NADPH required ______.

In Botany class, teacher explains, Synthesis of one glucose requires 30 ATPs in C₄ plants and only 18 ATPs in C₃ plants. The same teacher explains C₄ plants are more advantageous than C₃ plants. Can you identify the reason for this contradiction?

Grasses have an adaptive mechanism to compensate photorespiratory lossesName and describe the mechanism.

Which of the following is a flowering plant with nodules containing filamentous nitrogen fixing micro - organisms?

Flowers are zygomorphic in ______.

Give the floral characters of Clitoria ternatea.

How will you distinguish Solanaceae members from Liliaceae members?

Identify true statement regarding light reaction of photosynthesis.

Two groups (A & B) of bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to the light of wavelength 400-450 nm & Group B to light of wavelength of 500-550 nm. Compare the photosynthetic rate of the 2 groups giving reasons.

When there is plenty of light and a higher concentration of O₂, what kind of pathway does the plant undergo? Analyse the reasons.