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State PSC Science & Technology — practice questions — page 3

Explore 311 free Science & Technology questions in State PSC Science. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 61–90 of 311.

HIV belongs to a group of viruses called:Read the answer and worked solution →The widely used diagnostic test for AIDS is:Read the answer and worked solution →The most feared property of malignant tumours, spreading to distant sites, is:Read the answer and worked solution →Catch the bacterial diseasesRead the answer and worked solution →Pop the innate barriersRead the answer and worked solution →Run the pathogensRead the answer and worked solution →Slice the disease wordsRead the answer and worked solution →Active or passive immunityRead the answer and worked solution →Sort the drug sourcesRead the answer and worked solution →Type the numberRead the answer and worked solution →Health and disease bingoRead the answer and worked solution →Milk is converted to curd by Lactobacillus and other:Read the answer and worked solution →Bread dough is fermented using the baker's yeast:Read the answer and worked solution →Toddy, a traditional drink of southern India, is made by fermenting:Read the answer and worked solution →The large holes in Swiss cheese are due to carbon dioxide produced by:Read the answer and worked solution →Wine and beer differ from whisky, brandy and rum because they are produced without:Read the answer and worked solution →Penicillin was named after the mould:Read the answer and worked solution →Penicillin's full potential as an antibiotic was established by Ernest Chain and:Read the answer and worked solution →Fleming, Chain and Florey received the Nobel Prize in:Read the answer and worked solution →Citric acid is produced commercially by the fungus:Read the answer and worked solution →Lipases in detergents help remove:Read the answer and worked solution →Streptokinase, used as a clot buster after heart attacks, is produced by:Read the answer and worked solution →Cyclosporin A, an immunosuppressant for transplant patients, comes from the fungus:Read the answer and worked solution →Statins that lower blood cholesterol are produced by the yeast:Read the answer and worked solution →In secondary sewage treatment, aerobic microbes grow into masses called:Read the answer and worked solution →The sediment of bacterial flocs from the settling tank is called:Read the answer and worked solution →Anaerobic sludge digesters produce a gas mixture of methane, carbon dioxide and:Read the answer and worked solution →Bacteria that produce methane while growing anaerobically on cellulose are called:Read the answer and worked solution →Biogas technology in India was developed mainly by IARI and:Read the answer and worked solution →Bacillus thuringiensis spores sprayed on brassicas kill:Read the answer and worked solution →

Worked practice questions

HIV belongs to a group of viruses called:

  1. Pox viruses
  2. Retroviruses
  3. Rhino viruses
  4. Adenoviruses
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Correct answer: B. Retroviruses

1. Its RNA genome is enclosed in an envelope. 2. HIV is a retrovirus. 3. Reverse transcriptase makes viral DNA. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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The widely used diagnostic test for AIDS is:

  1. Biopsy
  2. X-ray
  3. ELISA
  4. Widal
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Correct answer: C. ELISA

1. It stands for enzyme linked immuno-sorbent assay. 2. ELISA detects HIV infection. 3. Anti-retroviral drugs only prolong life. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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The most feared property of malignant tumours, spreading to distant sites, is:

  1. Inhibition
  2. Benignity
  3. Biopsy cut
  4. Metastasis
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Correct answer: D. Metastasis

1. Cells slough off and travel through blood. 2. This spread is metastasis. 3. Benign tumours stay in place. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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