General Science Jkssb Biology Set 1 Mcqs (605 MCQs) | JKSSB & SSC Quiz

General Science

jkssb biology set 1 mcqs

Download PDF

Topics

jkssb physics set 1 mcqs jkssb chemistry set 1 mcqs jkssb biology set 1 mcqs

Practice Questions

605 Total
Question 61 Discuss
Ask a Friend

Which of the Mendel's laws states that a diploid organism passes a randomly selected allele for a trait to its offspring, such that the offspring inherit one allele from each parent?

A
Law of dominance
B
Law of paired factor
C
Law of independent assortment
D
Law of segregation

Answer & Explanation

Correct Option: D

Gregor Mendel's fundamental Law of Segregation strictly dictates that the two defining alleles for any heritable trait thoroughly separate independently during gamete formation, ensuring each resulting gamete naturally carries only a single allele.
Question 62 Discuss
Ask a Friend

Which of the following is a part of apical meristem found in roots.

A
Protoderm
B
Leaf primordium
C
Differentiating vascular tissue
D
Axillary bud

Answer & Explanation

Correct Option: A

The protoderm is a critical primary meristematic tissue found at the very growing apex of both roots and shoots that strictly differentiates to rapidly form the plant's essential protective outer epidermis.
Question 63 Discuss
Ask a Friend

Which of the following causes enlargement and extension growth of cells?

A
Cytokinins
B
Abscisic acid
C
Auxins
D
Ethylene

Answer & Explanation

Correct Option: C

Auxins are highly influential, naturally occurring plant hormones that predominantly and aggressively promote massive cell elongation and expansion, particularly driving crucial upward and downward growth in stems and roots.
Question 64 Discuss
Ask a Friend

Who was the first person to conduct a systematic study of chromosomes during division and called this process mitosis?

A
Friedrich Miescher
B
Thomas Hunt Morgan
C
Antonie van Leeuwenhoek
D
Walther Flemming

Answer & Explanation

Correct Option: D

In the vibrant 1880s, the renowned German anatomist Walther Flemming meticulously documented rapid cell division in transparent salamander gills and officially coined the term 'mitosis' to brilliantly describe the thread-like movement of individual chromosomes.
Question 65 Discuss
Ask a Friend

In which year did a trio of scientists, Avery, MacLeod and McCarty, prove that except viruses, all living organisms have DNA as their genetic material?

A
1918
B
1902
C
1944
D
1961

Answer & Explanation

Correct Option: C

In 1944, researchers Avery, MacLeod, and McCarty impressively published their landmark microbiological experiment definitively identifying DNA—not surrounding protein—as the truly functional 'transforming principle' that fundamentally carries core genetic information.
Question 66 Discuss
Ask a Friend

In the context of DNA, which of the following principles governs the process of transcription?

A
The transforming principle
B
The principle of complementarity
C
Semiconservative nature of DNA
D
The principle of inheritance

Answer & Explanation

Correct Option: B

Cellular transcription is strictly governed by strict base complementarity, where an active RNA polymerase enzyme cleanly synthesizes a fresh mRNA strand by reliably pairing corresponding complementary RNA nucleotides to the exposed DNA template.
Question 67 Discuss
Ask a Friend

Which virus is responsible for causing AIDS?

A
Human Immunodeficiency Virus
B
Hepatitis B Virus
C
Human Papillomavirus
D
Epstein-Barr Virus

Answer & Explanation

Correct Option: A

Acquired Immunodeficiency Syndrome (AIDS) is famously known as the severe final stage of chronic infection actively caused by the Human Immunodeficiency Virus (HIV), which systematically targets and thoroughly destroys the susceptible host's immune system.
Question 68 Discuss
Ask a Friend

To remain healthy and disease free, taking

A
a diet that contains adequate amount of protein and fat
B
a diet that contains sufficient amount of all the nutrients that the human body needs to grow properly
C
a diet that contains adequate amount of carbohydrates
D
a diet that contains appreciable number of vitamins and minerals

Answer & Explanation

Correct Option: B

A consistently balanced diet reliably containing optimal, proportionate amounts of all required macronutrients, essential vitamins, vital minerals, and clean water is fundamentally essential to sustainably maintain robust immune function and overall long-term physiological health.
Question 69 Discuss
Ask a Friend

What is the primary source of energy for most ecosystems on Earth?

A
Tidal energy
B
Wind
C
Geothermal heat
D
Sunlight

Answer & Explanation

Correct Option: D

Abundant sunlight directly fuels massive ongoing photosynthesis in widespread autotrophic organisms like green plants and marine algae, heavily establishing the rock-solid foundational base of usable energy that ultimately sustains nearly all global food webs.
Question 70 Discuss
Ask a Friend

The major carbohydrate of milk is

A
Lactose
B
Sucrose
C
Fructose
D
Maltose

Answer & Explanation

Correct Option: A

Lactose is definitively a naturally occurring disaccharide sugar found quite abundantly in mammalian milk, heavily functioning as an absolutely vital primary source of quick, digestible energy for developing nursing infants.
Previous Next