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ID number:167047
 
Author:
Evaluation:
Published: 22.03.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

1.Ogļhidrāti un to loma šūnā un tautsaimniecībā.
To sastāvā ir C, O un H, kā arī ķīmiskajās saitēs augos fotosintēzē akumulēta enerģija. Raksturīgākie šīs grupas pārstāvji ir:
cukuri – ūdenī šķīstoši, organismos viegli izmantojami, enerģiju saturoši savienojumi;
ciete – (dzīvnieku org.- glikogēns) ūdenī nešķīst, bet uzbriest, kalpo kā rezerves enerģiju saturoša viela. Lai izmantotu organismā, vispirms ciete jāsadala glikozes molekulās;
celuloze – sastopama tikai augos, izveidota no glikozes molekulām, ūdenī nešķīst, kalpo kā uzbūves materiāls, organismos maz izmantojama.…

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