SSLC (English Medium) कक्षा १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Write a short note on mesophyll.

The vas deferens serve to transport the ovum.

Write the characteristics of insect-pollinated flowers.

Insect pollinated flowers are characterized by dry and smooth pollen.

The ______ units form the backbone of the DNA.

DNA consists of two ______ chains.

New nucleotides are added and a new complementary strand of DNA is formed with the help of enzyme DNA polymerase.

Down’s syndrome is a genetic condition with 45 chromosomes.

What is the name given to the segments of DNA, which are responsible for the inheritance of a particular character?

Name the bond which binds the nucleotides in a DNA.

Label the parts of the DNA in the diagram given below. Explain the structure briefly.

How is the structure of DNA organized?

What is the biological significance of DNA?

1. Assertion: Gas is highly compressible than solid and liquid
2. Reason: Interatomic or intermolecular distance in the gas is comparably high.

Explain why, the ceilings of concert halls are curved.

What is mean by the reflection of sound?

Explain reflection at the boundary of a rarer medium.

Explain Reflection at curved surfaces.

One roentgen is equal to _______ disintegrations per second.

Define critical mass.