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Biology - MOST IMPORTANT Executive Previous Year Questions

Practice real questions from previous year exams of Executive.

📘 Excretory System-I: General📚 Misc

Q1

Which of the following is NOT correct regarding excretion in plants?

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

In plants, oxygen itself can be thought of as a waste product generated during photosynthesis.

B.

Plants can get rid of excess water by transpiration.

C.

Plants also excrete some waste substances into the soil around them.

D.

Plant waste products are stored in cellular mitochondria.

📘 Reproduction in Organisms- IV (Female Reproductive System)📚 Uterus

Q2

Which of the following is the site for embryo implantation?

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

Uterus

B.

Placenta

C.

Oviduct

D.

Ovary

📘 Cell Structure and Organelles📚 Endoplasmic Reticulum-Rough and Smooth

Q3

Rough endoplasmic reticulum looks rough under a microscope, because it has particles called _________ attached to its surface.

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

mitochondria

B.

lysosomes

C.

vacuoles

D.

ribosomes

📘 Digestive System- I📚 Nutrition - General Facts

Q4

Which of the following statements is correct for the length of the food chain?

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

The length and complexity of food chains vary as per the ecosystem.

B.

The length and complexity of the food chain are constant.

C.

The length is constant, but the complexity varies.

D.

The length varies, but the complexity of the food chain is constant.

📘 Digestive System- I📚 Saprophytic Nutrition

Q5

Which of the following is a correct function of saprophytes in waste management?

🎯 DFCCIL Executive Signal & Telecommunication 2025

A.

Breaks down plastic only

B.

Breaks down the biodegradable substances only

C.

Breaks down the non-biodegradable substances only

D.

Breaks down everything

📘 Evolution📚 Theory of Darwin

Q6

Charles Darwin gave the idea of _________.

🎯 DFCCIL Executive Operating 2018

A.

biological classification

B.

cell as a unit of life

C.

gene

D.

evolution

📘 Respiratory System- III (Respiratory Organs in Humans)📚 Alveoli

Q7

The alveoli in human beings are part of the system for ______.

🎯 DFCCIL Executive Operating 2018

A.

transportation

B.

respiration

C.

nutrition

D.

excretion

📘 Protozoal Diseases📚 Malaria

Q8

Which of the following infectious agents causes malaria?

🎯 DFCCIL Executive Operating 2018

A.

Fungi

B.

Bacteria

C.

Protozoa

D.

Virus

📘 Major Cell Types📚 Comparison between Plant and Animal Cell

Q9

Which of the following is absent in an animal cell?

🎯 DFCCIL Executive Operating 2018

A.

Cell membrane

B.

Nucleus

C.

Mitochondria

D.

Cell wall

📘 Simple Permanent Tissue📚 Parenchyma

Q10

Which of the following plant tissues is a living tissue?

🎯 DFCCIL Executive Operating 2018

A.

Sclerenchyma

B.

Tracheids

C.

Phloem fibres

D.

Parenchyma

📘 Viral Diseases📚 Corona

Q11

A vaccine for Covid-19 ‘Covaxin’ is developed by ______.

🎯 DFCCIL Executive Signal & Telecommunication 2021

A.

Serum Institute of Technology

B.

Glenmark Pharmaceuticals Limited

C.

Cipla

D.

Bharat Biotech

📘 Animal Tissue📚 Animal Tissue- General Facts

Q12

Which of the following is not an animal tissue?

🎯 DFCCIL Executive Signal & Telecommunication 2021

A.

Connective

B.

Muscular

C.

Xylem

D.

Epithelial

📘 Cell Structure and Organelles📚 Mitochondria

Q13

‘Pronuclear transfers’ technology recently developed by the U.K government is used _____.

🎯 DFCCIL Executive Signal & Telecommunication 2021

A.

to determine the medical history of a patient

B.

to prevent transmission of mitochondrial DNA disease

C.

for genetic modification of sperm producing cells

D.

to expand the usefulness of hearing aids

📘 Viral Diseases📚 Corona

Q14

Who became the first person in India to be vaccinated against the coronavirus?

🎯 DFCCIL Executive Mechanical 2021

A.

Rajat Goel

B.

Manish Kumar

C.

Poonam Gupta

D.

Jay Shah

📘 Classification of Kingdom📚 Misc

Q15

Animals are divided into how many groups?

🎯 DFCCIL Executive Mechanical 2021

A.

12

B.

7

C.

10

D.

5

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