Biology

Question 1

Microtubules

Answer 1

Functions:

1. Mitosis: pulling chromatids to opposite direction, anchor at centrosome
2. Flagella, cilia (eukaryotic Cell) (9+2 arrangement).
3. Inner transport in neuron (e.g dyne in)

Question 2

Imprinted gene

Answer 2

Genes that are expressed in a parent-specific manner (e.g epigenetic mark from mom is reserved in offspring)

Question 3

Glucose 6-phosphate dehydrogenase

Answer 3

Part of Pentose phosphate pathway

Glucose 6-phosphate dehydrogenase catalysts the conversion of glucose-6-phosphate to 6-phospho-gluconolactone

Question 4

Pyruvate kinase

Answer 4

Catalyze one way reaction (release large energy)

Pyruvate kinase converts phosphoenol pyruvate to pyruvate, releasing ATP

Question 5

Cloning tool

Answer 5

Need DNA polymerase, DNA ligase, reverse transcriptase

Question 6

Centrifugation

Answer 6

Supernatant (SN): liquid, less dense

Pellet: dense particles (at bottom of tube)