Biology And Human Welfare Mock Tests

27 questions available

Biology And Human Welfare Mock Test 1

Questions: 27

Sample Questions

NEET Biology

Which of the following statements about HIV (Human Immunodeficiency Virus) is correct?

A HIV targets and destroys helper T lymphocytes (CD4⁺ T cells), leading to severe immunodeficiency

B HIV is a bacteriophage that infects white blood cells

C HIV primarily attacks red blood cells, causing anemia

D HIV causes the immune system to overproduce antibodies

NEET Biology

Antibiotics are substances that inhibit or kill microorganisms. Which of the following correctly matches the antibiotic with its target and mode of action?

A Penicillin — inhibits protein synthesis by binding to the 30S ribosomal subunit

B Tetracycline — inhibits cell wall synthesis by blocking peptidoglycan cross-linking

C Streptomycin — inhibits protein synthesis by binding to the 30S ribosomal subunit

D Cycloheximide — inhibits DNA replication by blocking DNA gyrase

NEET Biology

In the nitrogen cycle, which bacteria convert nitrites (NO₂⁻) into nitrates (NO₃⁻)?

A Nitrosomonas

B Nitrobacter

C Azotobacter

D Pseudomonas

NEET Biology

Which of the following is the correct match between the disease and its causative organism?

A Malaria — Trypanosoma

B Filariasis — Wuchereria bancrofti

C Ascariasis — Plasmodium

D Dengue — Taenia

NEET Biology

Which of the following vitamins is water-soluble?

A Vitamin A

B Vitamin C

C Vitamin D

D Vitamin K

NEET Biology

The enzyme reverse transcriptase is used by which virus to replicate its genetic material?

A Adenovirus

B HIV (Human Immunodeficiency Virus)

C Tobacco mosaic virus

D Bacteriophage lambda

NEET Biology

Which of the following bacterial structures is primarily responsible for conjugation (transfer of genetic material between bacteria)?

A Capsule

B Pilus (sex pilus)

C Flagellum

D Plasma membrane

NEET Biology

In the human body, which type of white blood cell is primarily responsible for producing antibodies?

A Neutrophils

B B-lymphocytes (B cells)

C T-lymphocytes (T cells)

D Macrophages

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