List of top Biology Questions

Percentage of fresh water on Earth is \_\_\_\_\_\_.
The myelin sheath of the neuron is made of which type of cells?
Drip irrigation can reduce water consumption by \_\_\_\_\_\ percent.
Mendel had chosen \_\_\_\_\_\_ pairs of contrasting characters for his study:
Testosterone is secreted by which endocrine gland?
What is the dark colored outer zone in the internal structure of the kidney called?
The trait expressed in F₁ generation is called:
What is the condition that occurs when our body is filled with extra water and wastes due to kidney failure?
Which part of the brain is concerned with the sense of smell?
Different asexual reproduction methods seen in organisms are:
Gregor Johann Mendel is known as the Father of:
What do the cones in our eyes identify?
The angle of vision for a healthy human being is about:

The process of copying the genetic information from one strand of DNA into RNA is termed as transcription. The principle of complementarity of bases governs the process of transcription, also except that uracil comes in place of thymine. Study the complete transcription unit given below and answer the following questions:

The process of copying the genetic information

Describe the location of (C) and (D) in the transcription unit.

Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
Choose the correct option that indicates the enzyme, ribozyme in bacteria that acts as a catalyst.
Assertion (A): Corpus luteum secretes the hormone, progesterone. Reason (R): Hormone Progesterone is essential for maintenance of the endometrium.
The first menstruation is called:
Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution.

The cloning site present in the \( \textit{rop}\) site of \(\textit{E. coli}\) cloning vector pBR322 is:

Assertion (A): In dihybrid crosses involving sex-linked genes in \(\textit{Drosophila}\), generation of non-parental gene combinations are observed 
Reason (R): Two genes present on different chromosomes show linkage and recombination in \(\textit{Drosophila.}\)

Study the given molecular structure of a double-stranded polynucleotide chain of DNA and answer the questions that follow.
molecular structure of a double-stranded polynucleotide

How is the interaction between \(\textit{Ophrys}\) and its specific bee pollinator one of the best examples of co-evolution? Explain.

The basic scheme of the essential steps involved in the process of recombinant DNA technology is summarised below in the form of a flow diagram. Study the given flow diagram and answer the questions that follow.
essential steps involved in the process of recombinant DNA
Flowering plants with hermaphrodite flowers have developed many reproductive strategies to ensure cross-pollination. Study the given outbreeding devices adopted by certain flowering plants and answer the questions that follow.
Flowering plants
Note: All plants belong to the same species. × - No pollen tube growth/inhibition of pollen germination on stigma. ✓ - Pollen germination on stigma.