C षभज करत ष 3 a षभज करत ष b गल षथ

; c
िषभोजी े ेंक्रतंं ष ै।
3. a िषभोजी े ेंक्रतंं ष ै ; b ग्लूौो षथ
गलक्टो ंं िषौतेष कौय गय ; c ग्लूौो ंं
4. a िषभोजी े ेंक्रतंं ष ै ; b ग्लूौो ंं िषौतेष
कौय गय ; c ग्लूौो षथ ग लक्टो ंं
84. E. coli was grown in three different
experimental conditions. In one, it was grown
in medium containing glucose as carbon
source; in the second in medium containing
both glucose and galactose; and in third was
infected with phage. Match the curves shown
below to the treatment
1. a is grown in glucose; b is grown in glucose
and galactose; c is infected with phage
2. a is grown in glucose and galactose; b in
glucose; c is infected with phage
3. a is infected with phage; b is grown in
glucose and galactose; c in glucose
4. a is infected with phage; b is grown in
glucose; c in glucose and galactose
85.
ैर एतंं िोएे ईल -tRNA तेंथटे , ेैी ेंगष
तत्नषौोड ि अंषिषघतिष्टष tRNA युक्ष एतंं िो अम्ल
ौ े थ यथ षथ ेुंं तलष ैो ेौष ै। ौई जीष
20 तभन्ि tRNA तेंथटे राष ैं , षथ िा ौ
ु
जीष ांुओं ंं उे तेंथटे ौ अभ ष ै जो
ग्लूट तंं ि ौ तलए जूपरी tRNA (tRNA
Gln
) ौो
अाि ेज ष एतंं िो अम्ल े आषशि ौ तलए

22
ि दैए। षो य जीष ांु अाि तत्ोटीिों ंं ग्लूट तंं ि
ौे अंषिषघतिष्टष ौर ा ष ैं ? ेैी उत्षर िुि:
1. िष ेंश्लतशष जष ांिषौ तत्ोटीि ंं ग्लूट तंं ि
उातिस्थष िैीं ै। अिुष द - ाश्ि ाररषषघि ग्लूट ंं ट
ौो जूपरी स्थलों ार ग्लूट तंं ि ंं ााकदल दष ै।
2. इि जीष ांुओं ंं tRNA ौ तलए िषतशष्ट
एतंं िोएे इल tRNA तेंथटे (tRNA
glu
) tRNA
gln
ौो भी ग्लूट तंं ि े आषतशष ौरष ै।
3. इि जीष ांुओं ंं tRNA
glu
ौ तलए िषतशष्ट
एतंं िोएे इल tRNA तेंथटे tRNA
gln
ौो भी
ग्लूट ंं ट े आषतशष ौरष ै। उेौ ााक द एौ
दूेर एन् ईंं आषतशष tRNA
gln
ौ ग्लूट ंं ट
ौो ग्लूट तंं ि ंं ाररषनषघष ौर दष ै।
4. इि जीष ांुओं ंं , एतंं िोएे ईल tRNA तेंथटे
tRNA
glu
ौो ग्लूट ंं ट य ग्लूट तंं ि े आषतशष
ौरष ै , तत्ोटीि ेंश्ल मां ौ दनर ि उिौद
आषश्यौष ौ अिुे र।
85. Each aminoacyl-tRNA synthetase is precisely
able to match an amino acid with the tRNA
containing the correct corresponding
anticodon. Most organisms have 20 different
tRNA synthetases, however some bacteria
lack the synthetase for charging the tRNA for
glutamine (tRNA
Gln
) with its cognate amino
acid. How do these bacteria manage to
incorporate glutamine in their proteins?
Choose the correct answer.
1. Glutamine is not present in the newly
synthesized bacterial protein. Post transla-
tional modification converts glutamate to
glutamine at the required sites.
2. In these bacteria, the aminoacyl tRNA
synthetase specific for tRNA glutamate
(tRNA
glu
) also charges tRNA
gln
with
glutamine.
3. In these bacteria, the aminoacyl tRNA
synthetase specific for tRNA
glu
also charges
tRNA
gln
with glutamate. A second enzyme
then converts the glutamate of the charged
tRNA
gln
to glutamine.
4. In these bacteria, the aminoacyl tRNA
synthetase charges tRNA
glu
with either
glutamate or glutamine according to their
requirement during protein synthesis.