Recent questions tagged cell-chemistry-and-cell-biology

The major class of enzymes catalyzing the cleavage of $C-C, C-O, C-N$, or other bonds by elimination, leaving double bonds or rings, or addition of groups to double bonds...

Which ONE of the following options is CORRECT with respect to sequential breakdown of deoxyribonucleic acid (DNA) into lower-molecular weight compounds?Deoxyribonucleic a...

Which of the following statements is/are CORRECT based on the electron donor $\text{(ED)}$ and electron acceptor $\text{(EA)}$ used in various bacterial mediated reaction...

​​​​​Choose the correct statement(s) from the following regarding the structure/ reproduction of microorganismsProkaryotes do not have nucleus but Eukaryotes have nucleus...

​​​​​Consider the following statements on microbial metabolismUtilization of carbon for cell synthesis is termed as anabolism. During catabolism, adenosine triphosphate (...

Which of the following statement$\text{(s)}$ is/are CORRECT?DNA is composed of nucleotidesFive types of nitrogenous bases occur in DNAEach phosphate is attached to two de...

Enzymes with the class of enzymes are listed in the table.EnzymeClass of Enzyme$\text{(a)}$ Lactate dehydrogenase$\text{(i)}$ Isomerases$\text{(b)}$ Alanine racemase$\tex...

Read the following statementsI. Photosynthesis takes place within the chloroplasts of the eukaryotes, whereas the breakdown of complex molecules to yield energy takes pla...

Read the following statementsi. Aerobic heterotrophic bacteria uses organic matter for carbon source and energy source.ii. Aerobic heterotrophic bacteria uses carbon diox...

The ratio of the moles of $\mathrm{CO}_2$ evolved to the moles of $\mathrm{O}_2$ consumed in respiration also called the respiratory quotient, is calculated for a carbohy...

Which one of the following statements is NOT correct?Photophosphorylation is the synthesis of $\text{ATP}$ from $\text{ADP}$ and inorganic phosphate in the presence of li...

Read the following statementsi. In endogenous metabolism by aerobic bacteria, electron acceptor is present inside the cells.ii. In endogenous metabolism by aerobic bacter...

Which of the following is the terminal electron acceptor in the electron transport chain of aerobic respiration?Water$\mathrm{NADH}$$\mathrm{O}_{2}$Cytochrome-c

Which of the following pairing of nucleotide bases is present in double helix DNA?Thymine - CytosineAdenine - ThymineCytosine - AdeninUracil - Thymine

Which of the following is true for the nitrifying bacteria belonging to genus Nitrobacter?They are autotrophs.They are eukaryotes.They convert chemical energy to cellular...

Which of the following is/are correct for the process of glycolysis?There is net decrease in standard Gibbs free energy.The end product is glyceraldehyde 3-phosphate.Fist...

A typical plasmid-free bacterial cell having a single chromosome consists of $\sim 55 \%$ protein, $\sim 3 \%$ DNA and $\sim 21 \%$ RNA, where " $\% "$ " represents perce...