Practice Questions

TLS Online TPP Program

#Question id: 762

Regarding the sugar residues in nucleic acids, which, if any, of the following statements is incorrect?

#Unit 1. Molecules and their Interaction Relevant to Biology

The sugar is always based on a heterocyclic ring that consists of one oxygen atom and four carbon atoms, one of which is connected to a fifth carbon atom, the 5’ carbon atom.
The internal sugar residues in a DNA strand normally have free hydroxyl groups, unlike those in an RNA strand.
Bases are covalently linked to the carbon 1’ atoms of the sugars.
Neighboring sugar residues are linked to each other by a phosphodiester bond that connects the 3’ carbon atom on one sugar to the 5’ carbon atom of its neighbour.

More Questions

#Question id: 11679

#Unit 7. System Physiology – Animal

After blood flow is artificially reduced at one kidney, you would expect that kidney to secrete more of the hormone known as ________.

#Question id: 15782

#Unit 5. Developmental Biology

#Question id: 24636

#Unit 2. Cellular Organization

#Question id: 867

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the correct diseases with their precursors

Disease	Protein or precursor involved in disease
1. Cystic fibrosis	a. Prion protein
2. Creutzfeldt–Jakob disease	b. CFTR
3. Familial hypercholesterolaemia	c. LDL receptor
4. fatal familial insomnia	d. β-amyloid protein
5. Alzheimer’s disease	e. β-hexosaminidase

#Question id: 19922

#Unit 12. Applied Biology