ASU BIO 181 EXAM 1 LATEST 2023-2024 ACTUAL EXAM 200
QUESTIONS AND CORERCT DETAILED ANSWERS
(VERIFIED ANSWERS ) |ALREADY GRADED A+
What limits the paramecium from acquiring more complex functions? - ANSWER- The number of bimolecular machines it can fit within its "space". The existing bio-machines must repurpose themselves completely to complete a task, which means it can't fully 'automate' itself.
What organ is the contractile vacuole assumed precursor to? - ANSWER- Kidney - both systems expel excess; CV with extra water and the kidney expelling waste via urine (water + ick)
T/F The paramecium swims by way of using a flagella - ANSWER- FALSE
- The paramecium moves using cilia
A cell that is itself an organism must have a minimum of four needs presented in lecture. List these four things. - ANSWER- 1.
REPRODUCTION
2. FINDING A MATE
3. FOOD
4. SHELTER 1 / 3
A cancer cell is: - ANSWER- Anchorage INDEPENDENT and
IMMORTAL
A normal cell is: - ANSWER- Anchorage DEPENDENT and MORTAL
The loss of the ____ _____ was the first step for development in the Endomembrane theory - ANSWER- Cell Wall
What limitations exist with cell culture techniques? - ANSWER- 1. Not all cells grow in a culture
- The "shape" (histotype and structure) changes
- The metabolism can change
As a cell 'walks', list the order of events: - ANSWER- 1. flattens
- filipodia
- lamellipodia
- cell muscle ( actin and myosin)
- cell "superglue"
- retraction fiber
Do cancer cells experience contact inhibition? - ANSWER- NO. They will continue multiplying under any circumstance.
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T/F The cytoskeleton gave rise to the nuclear envelope. - ANSWER-
FALSE.
What is the outer boundary of life in a prokaryotic cell? - ANSWER- Plasma Membrane
Explain oxygen conditions in ancient earth. - ANSWER- There was not a lot of it around, and it was toxic to most living things at the time.
T/F DNA in extant prokaryotic cells is circular. - ANSWER- TRUE
How was it thought that cells filtered ancient oxygen? Why? - ANSWER- Oxygen was toxic; so it is thought that peroxisomes evolved in proto-eukaryotes to filter it.
Association with ribosomes and *what* would support the endomembrane theory? - ANSWER- Membrane invaginations - the concept of ribosomes latching on to these invaginations is what the endomembrane theory poses gave creation to the RER.
Why was motility important to proto cells? - ANSWER- It allowed them to flee predators and move towards food.
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