Start learning →

ISC Class 12 Biology in Human Welfare & Health — practice questions

Explore 58 free Biology in Human Welfare & Health questions in ISC Class 12 Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Biology in Human Welfare & Health with Quill →

Biology in Human Welfare & Health questions and exercises with answers

Showing questions 1–30 of 58.

Antibodies passed from a mother to her infant through breast milk give the infantRead the answer and worked solution →The yeast used in baking and brewing is:Read the answer and worked solution →Spot the odd one outRead the answer and worked solution →Biogas made from cattle dung is commonly called:Read the answer and worked solution →The spread of cancer cells from the original site to distant organs is calledRead the answer and worked solution →Order the reasoning: why vector control worksRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →HPV (Human Papillomavirus) is a known cause of:Read the answer and worked solution →Innate immunity is best described as:Read the answer and worked solution →The MOST ABUNDANT antibody class in human blood is:Read the answer and worked solution →Typhoid fever is caused by:Read the answer and worked solution →True or false: what health meansRead the answer and worked solution →Tap every public health measure the chapter namesRead the answer and worked solution →Cyclosporin A is obtained from which organism?Read the answer and worked solution →Vector-borne diseaseRead the answer and worked solution →Personal or public measure?Read the answer and worked solution →True or false: immunity and diseaseRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Polio is caused by:Read the answer and worked solution →The vector that transmits MALARIA is:Read the answer and worked solution →According to WHO, health is best defined as:Read the answer and worked solution →Antibodies are produced byRead the answer and worked solution →Order the curd making stepsRead the answer and worked solution →Anabaena and Nostoc are examples of:Read the answer and worked solution →Bacteria that produce methane in a biogas plant are called:Read the answer and worked solution →Baculoviruses are used as biological control agents against:Read the answer and worked solution →True or false about useful microbesRead the answer and worked solution →

Worked practice questions

Antibodies passed from a mother to her infant through breast milk give the infant

  1. active immunity, lifelong
  2. passive immunity, short-lived
  3. no immunity
  4. innate immunity only
Show answer and solution

Correct answer: B. passive immunity, short-lived

Mother's antibodies (passed via colostrum and breast milk) give the baby passive immunity — protective but short-lived, because the baby isn't making them. Bridges the gap until the baby's own immune system develops.

Open this question →

The yeast used in baking and brewing is:

  1. Propionibacter
  2. Streptococcus
  3. Saccharomyces
  4. Lactobacillus
Show answer and solution

Correct answer: C. Saccharomyces

1. Bread and traditional drinks use the same organism. 2. It is a fungus, not a bacterium. 3. It is Saccharomyces cerevisiae. 4. So the answer is Saccharomyces. _Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

Open this question →

Spot the odd one out

Read exercise and reference answers
Questions
  1. Items
    1. Sewage
    2. Curd
    3. Dough
    4. Cheese
    Odd item
    Sewage
  2. Items
    1. Biogas
    2. Penicillin
    3. Methanogen
    4. Gobar gas
    Odd item
    Penicillin
  3. Items
    1. Fleming
    2. Chain
    3. Rhizobium
    4. Florey
    Odd item
    Rhizobium
  4. Items
    1. Rhizobium
    2. Glomus
    3. Anabaena
    4. Baculovirus
    Odd item
    Baculovirus
Instructions
Tap the item that does not belong with the others.
_Source: syllabus Biology, Ch 8 'Microbes in Human Welfare'_

Open this exercise →

How to practise

  1. Choose a Biology in Human Welfare & Health question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Biology in Human Welfare & Health practice for ISC Class 12. Read explanations as you go. No signup form needed to start.

Practise Biology in Human Welfare & Health →

More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsEcology and Environment