Biochemistry (GATE)
GATE Molecular Biology and GeneticsBiomolecules and Their ConformationBiotechnologyMicrobiologyRecombinant DNA TechnologyProkaryotic and Eukaryotic Cell Structure
Questions
Identify the false statements:
- Aspartate is a ketogenic amino acid.
- Arginine is the immediate precursor of NO.
- Asparagine is an essential amino acid.
- Glycine is an optically inactive amino acid.
- Both 1 and 2
- Both 1 and 3
- Both 2 and 3
- Both 2 and 4
- Both 3 and 4
___________ is a dipeptide of the amino acids beta-alanine and histidine.
- Ubiquitin
- Carnosine
- Carnitine
- Serotonin
- Agmatine
__________ is an example of sulphur containing a non-steroidal anti-inflammatory drug.
- Aspirin
- Hydrochlorothiazide
- Sulfamethoxazole
- Naproxen
- Ampiroxicam
Which of the following are a pair of second generation fluoroquinolones?
- Nalidixic acid and piromidic acid
- Ciprofloxacin and ofloxacin
- Gatifloxacin and levofloxacin
- Moxifloxacin and gemifloxacin
- Gatifloxacin and gemifloxacin
Which of the following were discovered by Albrecht Kossel?
- Arginine
- Histidine
- Agmatine
- Carnosine
- Carnitine
- Both 1 and 2
- Only 1, 2 and 3
- Both 2 and 3
- Only 2, 3 and 4
- Both 4 and 5
Which of the following antibiotics acts by inhibiting mycolic acid synthesis?
- Isoniazid
- Norfloxacin
- Rifampin
- Streptomycin
- Sulfadiazine
Which of the following set of antibiotics act by blocking cross linking via competitive inhibition of the transpeptidase enzyme?
- Cefoxitin, Cefaclor, Cefuroxime
- Gentamicin, Neomycin, Amikacin
- Penicillin G, Ampicillin, Methicillin
- Chloramphenicol, Quinupristin, Dalfopristin
- Ciprofloxacin, Norfloxacin, Enoxacin
Which of the following antibiotics act by inhibition of 50S ribosomal subunit?
- Neomycin
- Streptomycin
- Erythromycin
- Azithromycin
- Both 1 and 2
- Both 1 and 3
- Both 2 and 3
- Both 2 and 4
- Both 3 and 4
Which of the following type of herbicides act by inhibition of acetolactate synthase?
- Sulfonylurea
- Imidazolinone
- Dinitroaniline
- Triazine
- Both 1 and 2
- Both 1 and 4
- Both 2 and 3
- Both 2 and 4
- Both 3 and 4
Which of the following is a pair of exoribonucleases?
- RNase A and RNase H
- RNase A and RNase R
- RNase A and RNase T
- RNase H and RNase T
- RNase R and RNase T
Which of the following drugs are used as skeletal muscle relaxants?
- Telenzepine
- Pancuronium
- Oxybutynin
- Tubocurarine
- Both 1 and 2
- Both 1 and 4
- Both 2 and 3
- Both 2 and 4
- Both 3 and 4
Which of the following cell structures are not found in prokaryotic cells?
- Peroxisomes
- Ribosomes
- Lysosomes
- Golgi Complex
- Only 1, 2 and 3
- Only 1, 2 and 4
- Only 1, 3 and 4
- Only 2, 3 and 4
- All of the above
Match the column – I (antibiotics) with column – II (mechanism of action) and select the correct option.
| Column – I |
</strong>|<strong> Column – II</strong>|
|A. Bacitracin|1. DNA Synthesis Inhibitors|
|B. Tetracyclines|2. Protein Synthesis Inhibitors|
|C. Metronidazole|3. Folic Acid Synthesis Inhibitors|
|D. Sulfonamides|4. Inhibits cell wall synthesis|
- A - 3, B - 4, C - 2, D - 1
- A - 2, B - 3, C - 4, D - 1
- A - 4, B - 2, C - 1, D - 3
- A - 3, B - 2, C - 4, D - 1
- A - 3, B - 1, C - 4, D - 2
Match the column – I (Structures of cells) with column – II (Relative functions) and select the correct option.
| Column – I |
</strong>|<strong> Column – II</strong>|
|A. Cytoplasmic membrane|1. Mineral storage of cells|
|B. Ribosome|2. Protein synthesis|
|C. Inclusion body|3. Tough, heat resistant structure that helps bacteria survive in adverse conditions|
|D. Endospore|4. Regulation of substance transport into and out of cells|
- A - 1, B - 2, C - 3, D - 4
- A - 2, B - 1, C - 4, D - 3
- A - 4, B - 2, C - 1, D - 3
- A - 3, B - 2, C - 4, D - 1
- A - 4, B - 3, C - 2, D - 1
Assertion (A): Under alkaline conditions, DNA is more stable than RNA.
Reason (R): RNA is more susceptible to base-catalysed hydrolysis than DNA.
Directions: In the following question there are two statements, Assertion (A) and Reason (R), consider both the statements independently and mark your answers as under:
1. If A and R both are correct and R is the correct explanation of A.
2. If A and R both are correct and R is not the correct explanation of A.
3. If A is correct and R is incorrect.
4. If A is incorrect and R is correct.
5. If A and R both are incorrect.
- 1
- 2
- 3
- 4
- 5