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Practice MCQ Questions and answers on Biology-GK

Learn and practice General Knowledge questions and answers on Biology with very easy and understandable explanations. GK questions are very helpful different type of competitive exams. Page-1 section-11

Each section contains 100 MCQs on Biology .
1
In man there are how many pairs of homologous chromosomes?
Discuss
Answer & Solution
Answer: Option B
Solution:
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
2
It is composed of two polynucleotide chains which are coiled around each other in the form of a double helix.
Discuss
Answer & Solution
Answer: Option A
Solution:
DNA) is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids.
3
How many chromosomes are in a human gamete?
Discuss
Answer & Solution
Answer: Option A
Solution:
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
4
What is the unit of heredity?
Discuss
Answer & Solution
Answer: Option C
Solution:
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
5
Who discovered genetic material?
Discuss
Answer & Solution
Answer: Option C
Solution:
In the 1920s, Frederick Griffith made an important discovery. He was studying two different strains of a bacterium, called R (rough) strain and S (smooth) strain.
6
Which one of the following is not a genetic disorder?
Discuss
Answer & Solution
Answer: Option D
Solution:
Xerophthalmia is not a genetic disorder.
7
Who is known as Father of Modern Genetics?
Discuss
Answer & Solution
Answer: Option C
Solution:
Gregor Mendel is known as Father of Modern Genetics.
8
How many pairs of chromosomes are found in a human cell?
Discuss
Answer & Solution
Answer: Option B
Solution:
A human cell has 23 pairs of chromosomes.
9
The experimental material used by Gregor Mendel is ________
Discuss
Answer & Solution
Answer: Option A
Solution:
Mendel carried out his key experiments using the garden pea, Pisum sativum, as a model system.
10
Mendel's second law is the law of
Discuss
Answer & Solution
Answer: Option B
Solution:
The results of Mendel's second set of experiments led to his second law. This is the law of independent assortment. It states that factors controlling different characteristics are inherited independently of each other.