IB Biology (SL) Topic 1

What type of interaction is responsible for the cohesion between water molecules?

• Through ionic bonding

• Through covalent bonding

• Through polar covalent bonds

• Through hydrogen bonding

Why is water an effective solvent for ionic and polar compounds?

• It has a high specific heat.

• It is non-polar.

• It can form hydrogen bonds.

• It is a solid at room temperature.

What are the components of a nucleotide?

• Sugar, phosphate, nitrogenous base.

• Protein, lipid, carbohydrate.

• Water, salt, mineral.

• Enzyme, substrate, product.

What process links the sugar-phosphate backbone in DNA and RNA, and what is the name of the bond?

• Hydrolysis, hydrogen bond.

• Condensation, peptide bond.

• Dehydration synthesis, phosphodiester bond.

• Oxidation, ionic bond.

What is the function of nitrogenous bases in the structure of DNA?

• They act as enzymes.

• They store genetic information by pairing.

• They provide energy for cellular processes.

• They form the backbone of the DNA strand.

What is the sugar found in RNA nucleotides?

• Ribose.

• Deoxyribose.

• Glucose.

• Fructose.

What is the role of hydrogen bonds in the structure of DNA?

• To provide energy.

• To hold the two strands together.

• To catalyze reactions.

• To store genetic information.

What does it mean that DNA is composed of two antiparallel strands?

• The strands run in the same direction.

• The strands are identical.

• The strands run in opposite directions.

• The strands are not connected.

List three structural differences between DNA and RNA.

• DNA is single-stranded, RNA is double-stranded, DNA has uracil.

• DNA is double-stranded, RNA is single-stranded, RNA has uracil.

• DNA has uracil, RNA has thymine, DNA is single-stranded.

• DNA and RNA have the same structure.

Which is the correct structure of a carbon atom?

• 6 protons, 6 neutrons, 6 electrons.

• 5 protons, 5 neutrons, 5 electrons.

• 7 protons, 7 neutrons, 7 electrons.

• 8 protons, 8 neutrons, 8 electrons.

Tags

NGSS.MS-PS1-1