Practice Test Sets (Total Questions: 100)

Topic Practice: Microbes in Human Welfare (Test - 1)

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About Microbes in Human Welfare MCQ

Ace Microbes in Human Welfare for NEET UG with important chapter MCQs, applications in household, industry, sewage treatment, and bio-fertilizer notes.

This Microbes in Human Welfare MCQ practice set is designed for students preparing for school exams and competitive exams. It contains 100 multiple choice questions divided into 2 test sets of up to 50 questions each. Every question has four options, and after answering you can see the correct option, a detailed explanation and how other users answered.

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Sample Microbes in Human Welfare Questions

A double-stranded B-DNA molecule contains 20% Adenine. What will be the percentage of Cytosine and the total percentage of Purines in this DNA sample according to Chargaff's rules?
- A. Cytosine = 30%, Total Purines = 50%
- B. Cytosine = 20%, Total Purines = 40%
- C. Cytosine = 30%, Total Purines = 30%
- D. Cytosine = 60%, Total Purines = 50%
If a B-DNA molecule is 1.7 meters long, calculate the total number of base pairs (bp) present in this DNA molecule.
- A. $5 \times 10^9\text{ bp}$
- B. $5 \times 10^6\text{ bp}$
- C. $3.3 \times 10^9\text{ bp}$
- D. $6.6 \times 10^9\text{ bp}$
The nucleosome core particle consists of an octamer of histone proteins wrapped by approximately how many base pairs of DNA?
- A. $200\text{ bp}$ wrapped around H1 protein
- B. $146\text{ bp}$ wrapped around two copies each of H2A,H2B,H3, and H4
- C. $400\text{ bp}$ wrapped around H1,H2A,H2B, and H3
- D. $100\text{ bp}$ wrapped around non-histone proteins
In Avery, MacLeod, and McCarty's experiment, transformation of non-virulent R-strain bacteria into virulent S-strain bacteria was completely inhibited ONLY when treated with which enzyme?
- A. Proteases
- B. RNase
- C. DNase
- D. Lipase
In Hershey and Chase's bacteriophage experiment, radioactive isotopes $^{32}P$ and $^{35}S$ were used to label which viral components respectively?
- A. $^{32}P$ labeled protein coat, $^{35}S$ labeled viral DNA
- B. $^{32}P$ labeled viral DNA, $^{35}S$ labeled protein coat
- C. $^{32}P$ labeled RNA, $^{35}S$ labeled lipids
- D. Both labeled viral DNA

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