IB Biology 1.2 Study Exam Questions & Answers.
Do prokaryotes have a compartmentalised cell structure? - CORRECT ANSWER No
Do eukaryotes have a compartmentalised cell structure? - CORRECT ANSWER Yes e.g. nucleus
What are the benefits of a compartmentalised structure? - CORRECT ANSWER DNA...
Do prokaryotes have a compartmentalised cell structure? - CORRECT ANSWER No
Do eukaryotes have a compartmentalised cell structure? - CORRECT ANSWER Yes e.g. nucleus
What are the benefits of a compartmentalised structure? - CORRECT ANSWER DNA is isolated and can
carry out its functions without being affected by other processes that are carried out within the cell
Efficiency of metabolism as enzymes and substrate are confined
Established conditions like optimum pH for enzymes
Isolate toxic materials from cytoplasm e.g. hydrolytic enzymes in lysosome
Change number and position of organelles based on cell's needs
Important when adjacent reactions are incompatable
Value of electron microscope over light microscope - CORRECT ANSWER Electron microscopes have a
much high resolution.
Value of a light microscope over an electron microscope - CORRECT ANSWER You can see living
organisms
You can see in colour
Much cheaper
What is resolution - CORRECT ANSWER the shortest distance between two points on a specimen that
can still be distinguished by the observer or camera system as separate entities.
Size of a prokaryotic ribosome - CORRECT ANSWER 70S
Size of a eukaryotic ribosome - CORRECT ANSWER 80S
, Major differences between prokaryotic and eukaryotic cells - CORRECT ANSWER Prokaryotes have
naked, circular DNA
Eukaryotes have DNA with proteins Histones
Prokaryotes have 70S ribosomes
Eukaryotes have 80S ribosomes
Eukaryotes have membrane bounded organelles
Prokaryotes on average are 1 - 10 micrometers
Eukaryotes on average are 10-100 micrometers
Prokaryotic drawing will includ - CORRECT ANSWER cell membrane, nucleoid, plasmid, cytoplasm,
ribosome, cell wall, pili, capsule, and flagella.
Plasma cell membrane function - CORRECT ANSWER Controls the movement of substances in an out of a
cell, separates the cell from the outside environment
Nucleoid function - CORRECT ANSWER Controls the cells function and its reproduction. Area that
contains naked DNA
Plasmid function - CORRECT ANSWER Carry a few genes. Promote antibiotic resistance
Cytoplasm function - CORRECT ANSWER site of metabolic reaction
Ribosome (70S) function - CORRECT ANSWER protein synthesis
Cell wall function - CORRECT ANSWER protects the cell
maintains shape
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