IB Cell Biology

Surface tension is caused by [blank_start]cohesive[blank_end] hydrogen bonding which resists the penetrating of its surface.

[blank_start]Hydrophilic[blank_end] is a term used to describe substances that are chemically attracted to water. [blank_start]Hydrophobic[blank_end] is a term used to describe substances that are insoluble in water.

All [blank_start]lipids[blank_end] are hydrophobic.

Which of the following statements are true?

Anabolism + Catabolism = [blank_start]Metabolism[blank_end]

Carbohydrates are made up of [blank_start]carbon, hydrogen and oxygen[blank_end]

glucose is a sugar and a [blank_start]mono[blank_end]saccharide.

Solvent + [blank_start]Solute[blank_end] = Solution

The [blank_start]polar[blank_end] attraction of [blank_start]large[blank_end] quantities of water molecules can interrupt [blank_start]intramolecular[blank_end] [blank_start]forces[blank_end] and result in the [blank_start]dissociation[blank_end] of the [blank_start]atoms[blank_end].

Water dissolves nutrients, gases and waste products making it a good [blank_start]solvent[blank_end].

Which of the following saccharides are disaccharides?

Drag and drop the correct functions and uses to the correct -saccharides. Glucose: [blank_start]Quickly absorbed and used in respiration[blank_end] Galactose: [blank_start]an energy molecule[blank_end] Fructose: [blank_start]transporting sugar[blank_end] Lactose: [blank_start]is quickly digested[blank_end] and found in milk Maltose: broken down by starch and is [blank_start]a quick store of energy[blank_end] Glycogen: Insoluble storage of glucose in the liver, [blank_start]produced using insulin[blank_end] Starch: [blank_start]Longterm energy store[blank_end] Cellulose: [blank_start]Structural unit in plant cell walls[blank_end]

Non-competitive inhibitors are not influenced by the [blank_start]concentration[blank_end] of the substrate. They bind irreversibly the the enzyme.

Non-competitve inhibitors need to bind at the active site of an enzyme to work.

The [blank_start]end[blank_end] product of respiration is ATP.

Which of the following statements about ATP is false?

How many sites does an inhibitor molecue have? [blank_start]__[blank_end]

When an inhibitor is present it fits into the [blank_start]allosteric[blank_end] site of an enzyme. This causes a [blank_start]conformational[blank_end] change in the enzyme's molecular shape so that the [blank_start]active[blank_end] site of the substrate changes. This causes the substrate to no longer be able to bind with the enzyme.

How is the negative feedback loop achieved with inhibitors? Start the loop at the upper left side with: 'The reaction slows down'

Sort the following statements into competitive and non-competitive inhibitors. Competitive - Increasing the inhibitor concentration [blank_start]increases the effect[blank_end] - Competes with the [blank_start]substrate[blank_end] at the active site - Active site [blank_start]remains the same[blank_end] Non-Competitive - Increasing the inhibitor concentration [blank_start]doesn't influence the effect[blank_end] - Inhibitor [blank_start]does not bind[blank_end] at the active site - Active site [blank_start]may change shape[blank_end]

Label this chlamydomona

Label the Eschericha coli

Differentiation is a process that occurs in the cells of [blank_start]multi[blank_end]cellular organisms.

Match the stem cells with their functions. Totipotent - Can differentiate [blank_start]into any type of cell[blank_end] Pluripotent - Can differentiate [blank_start]into many types of cells[blank_end] Multipotent - Can differentiate [blank_start]into a few closely-related types of cell[blank_end] Uni-potent - Can differentiate [blank_start]only it's own type[blank_end]

Label the following 2D fluid mosaic model.

Match the following with their correct functions. [blank_start]Channel protein[blank_end]: for passage through the membrane [blank_start]Pump protein[blank_end]: for [blank_start]active transport[blank_end] across the membrane. (using energy from ATP) Electron carrier proteins: a chain of [blank_start]peripheral and integral[blank_end] proteins that allow electrons to pass through the [blank_start]membrane[blank_end] Enzymes held in the membrane: [blank_start]catalyze[blank_end] reactions at the surface of the membrane. (within or outside of the cell) [blank_start]Active site[blank_end]: the substrate molecule fits here and the reaction then occurs Binding protein for attachment of a specific [blank_start]hormone[blank_end]: a signal is then generated that is transmitted inside the cell cell-cell recognition site: - attachment may result in cells [blank_start]binding[blank_end] together [blank_start]binding sites[blank_end]: for antigen-[blank_start]antibody[blank_end] reaction

Two amino acids undergo a condensation reaction to form a [blank_start]Di-Peptide[blank_end] bond.

Many different amino acids linked together by peptide bonds is called a [blank_start]polypeptide[blank_end].

Different amino acid sequuences will fold into different configurations due to the chemical properties of the [blank_start]R-groups[blank_end].

Proteins that consist of more than one polypeptide chain linked together are known as having a [blank_start]quaternary[blank_end] structure.

Meiosis Steps: 1. [blank_start]Metaphase I[blank_end] -- [blank_start]homologous chromosomes line up[blank_end] 2. [blank_start]Anaphase I[blank_end] -- [blank_start]spindle fibers pull pairs[blank_end] 3. [blank_start]Telophase II[blank_end] -- [blank_start]4 haploid (N) cells form[blank_end] 4. Interphase -- [blank_start]DNA replication occurs[blank_end] 5. [blank_start]Anaphase II[blank_end] -- [blank_start]sister chromatids separate[blank_end] 6. [blank_start]Telophase I[blank_end] -- [blank_start]2 haploid calls form[blank_end] 7. [blank_start]Metaphase I[blank_end] --- [blank_start]spindle fibre attach to pairs[blank_end] 8. [blank_start]Anaphase II[blank_end] -- [blank_start]chromatids move to ends of cell[blank_end] 9. [blank_start]Prophase I[blank_end] -- [blank_start]crossing over (if any) occurs[blank_end]

What is a nucleosome?