Week 1- Life At Cellular Level

Question 1

Describe structures present in all cell types

Answer 1

Plasma membrane, cytoplasm, cytoskeleton, ribosomes & genetic materials

Question 2

Define the roles of nucleus, endoplasmic reticulum, ribosome, Golgi apparatus, lysosome, peroxisome, mitochondrial, flagellum, cilium

Answer 2

Nucleus- stores dna/ dna replication, endoplasmic reticulum- protein synthesis/ lipid metabolism, ribosome- rna synthesis, Golgi apparatus- processes/ sorts lipids and proteins, lysosome- digestive enzymes

Question 3

4 elements used to construct human bio molecules

Answer 3

H, O, N, C

Question 4

Explain polarity

Answer 4

Water is polar, polarity gives rise to hydrogen bonding, molecules that contain hydrogen bonding or charged molecules tend to be water soluble

Question 5

Explain pH

Answer 5

Body pH is 7.4, expressing H+ over a range of concentrations. Buffers help maintain pH the main ones are phosphate and bicarbonate

Question 6

Define metabolism

Answer 6

Continuous flow of energy and matter through intermediary metabolites and enzyme catalystsed reactions