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GATE preparation for Life Sciences

(21 Posts)

This thread is dedicated to preparation for Life Sciences - XL section of GATE. You may share questions from topics like Chemistry, Biochemistry, Botany, Microbiology, Zoology, Food Technology etc.

Question should not exceed 100 characters.Use add options for multiple choice questions and "Uploadimage/Add related data" for passage text papers.
Question should be at least 10 characters long.
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Anindita Dutta
Shared from GATE Mock Test - 2 (Life Sciences) on Feb 11, 2021 9:21 PM

If one arginine has a molecular mass of 174 Daltons, what would be the molecular mass of a circular polymer of 38 arginines?

 
6612 Dalton
5928 Dalton
5966 Dalton
5982 Dalton
Please type your answer before submitting.

The answer shown here is wrong as in case of circular peptide no water molecule is released and all 38 bonds form.

Priya Sarkar
Shared from GATE Mock Test - 3 (Life Sciences) on Jan 29, 2020 3:38 PM

Protein synthesis in bacteria ends when an antibiotic; puromycin, is added because

 
its peptidyl end resembles the tyrosyl-tRna a 7 helps binding of amino acid tyrosine
puromycin resembles tyrosyl-tRNA
it binds to peptide with C-terminus of growing polypeptide causing termination of polypeptide chain
it binds at 'A' binding site and terminates the polypeptide chain
Please type your answer before submitting.

Hi Priya, we (TCY) are  thankful for your feedback. Changes have been done in the solution, you can check it now.

Deblina Hota
Shared from Evolution - 3 on Aug 30, 2019 10:19 AM

Louis Pasteur used swan-neck flasks and meat broth in these flasks, and boiled them for several hours. The flask remained free of microbial contamination for months. After several months, when he broke the neck of one of the flasks, contamination by air and proliferation of microorganisms in the fluid occurred. This experiment disproved the concept of (theories of evolution)

 
spontaneous generation
biogenesis
panspermia
None of these
Please type your answer before submitting.

Ans option is incorrect. explanation is correct

Priya Bhargava
Shared from Plant Pathology (GATE) on Feb 15, 2019 7:14 PM

Which of the following statements is/are incorrect?

P. Bunchy top disease of banana is caused by Pyricularia grisea.
Q. Pseudomonas solanacearum causes pseudostem heart rot disease in banana.
R. Rhizome rot disease of banana is caused by Erwinia carotovora.

 
Only P
Only Q
Only R
Both R and Q
Both Q and R
Please type your answer before submitting.

Answer of question 15 is wrong option a is also wrong

Rishabh Sahu
Shared from Microbial Taxonomy on Jan 16, 2019 1:12 PM

In viral replication cycle, phage can be recovered by disrupting the infected bacterium during which of the following periods?

 
Rise period
Latent period
Eclipse period
Fall period
#
Please type your answer before submitting.

There is doubt in q. no. 15 explanation