Tag: instruments in biotechnology

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Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

Microsatellite sequences are repeat units with base pairs

  1. 1 - 6

  2. 5 - 30

  3. 11 - 60

  4. 20 - 120
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Microsatellites are polymorphic repeating units of 1–6 base pairs in length, found in human DNA. Microsatellites can be amplified for identification by PCR and can be used as molecular markers. Microsatellite analysis (MSA) is a PCR analysis of DNA in exfoliated urine cells.

So, the correct answer is '1-6.'

Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

Hypervariable repeats/minisatellite DNA sequences were discovered by

  1. Jeffreys et al

  2. Sharp and Roberts

  3. Parsons et al

  4. Sears and Sears
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Discovering their high level of variability, Sir Alec Jeffreys developed DNA fingerprinting based on minisatellites, solving the first immigration case by DNA in 1985, and the first forensic murder case, the Enderby murders in the United Kingdom, in 1986.

So, the correct answer is 'Jeffreys et al.'

Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

Satellite DNA contains

  1. Repetitive DNA

  2. Segments forming sn RNA

  3. Segments forming sc RNA

  4. Both B and C.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Satellite DNA consists of arrays of tandemly repeating sequences that are widely present (>30%) in the genome. Satellite DNA is mainly present in heterochromatin or the tightly packed regions of chromosomes in centromeres, telomeres, and sometimes even in the euchromatin region (active region of the genome).

So, the correct answer is 'Repetitive DNA.'

Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

Which is different in related species?

  1. Position of centromeres

  2. Position of NOR

  3. Satellite DNA

  4. All the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Satellite DNA consists of arrays of tandemly repeating sequences that are widely present (>30%) in the genome. Satellite DNA is mainly present in heterochromatin or the tightly packed regions of chromosomes in centromeres, telomeres, and sometimes even in the euchromatin region (active region of the genome).

So, the correct answer is 'Satellite DNA.'

Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

DNA probes used in finger printing are

  1. Highly sensitive electron microscope

  2. UV beams

  3. DNA segments having radioactive isotopes

  4. X-ray scanners
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

DNA probes used in fingerprinting are single-stranded DNA segments labeled with radioactive isotopes (or fluorescent markers) to detect complementary sequences on the membrane.