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Cytoplasmic Organelles
Lecture 3
45
Biology
Graduate
08/30/2015

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Term
Which cytoplasmic organelle is a membrane bound vesicle that functions as the formation of lysosomes and degradation of materials?
Definition
Endosomes
Term
Which cytoplasmic organelle has intermediate compartments (early and late) and possess proton pumps?
Definition
Endosomes
Term
What do proton pumps do?
Definition
They acidify the interior compartments
Term
Which cytoplasmic organelle is a membrane bound vesicle that functions in the degradation of macromolecules and endocytosis particles?
Definition
Lysosomes
Term
Which cytoplasmic organelle contains non-digestible fragments that remain enclosed as residual bodies?
Definition
Lysosomes
Term
Which cytoplasmic organelle is formed by LE and trans Golgi network that contain hydrolytic enzymes?
Definition
Lysosomes
Term
What is the pH within a Lysosome?
Definition
pH around 5
Term
Which cytoplasmic organelle is a membrane enclosed organelle that uses oxygen to catalase harmful substances?
Definition
Peroxisomes
Term
How does a peroxisome reproduce?
Definition
via fission
Term
Which cytoplasmic organelle is a small barrel shaped organelle that functions to target protein degradation?
Definition
Proteasomes
Term
Which cytoplasmic organelle function is to synthesize most ATP during aerobic cellular respiration?
Definition
Mitochondria
Term
Which cytoplasmic organelle structure is elongated, double membrane bound, contains cristae and ATP synthase complexes?
Definition
Mitochondria
Term
Which cytoplasmic organelle matrix contains DNA and ribosomes?
Definition
Mitochondria
Term
How does mitochondria reproduce?
Definition
Undergo self-replication by binary fission for limited replication
Term
What is the framework of the cell called?
Definition
Cytoskeleton
Term
What is a supporting framework of minute filaments and tubules called?
Definition
The cytoskeleton
Term
There are 3 types of cytoskeletal components, what are they?
Definition
Microfilaments
Intermediate Filaments (IFs)
Microtubles
Term
What are the functions of the cytoskeleton?
Definition
Maintain cell shape and orientation

Provide scaffolding layout for movement of material within the cell

Provide basic capabilities of motion and cell division
Term
Which cytoplasmic inclusion is non-membrane bound granules that exist abundantly in liver cells?
Definition
Glycogen Granules
Term
Which cytoplasmic inclusion is non-membrane bound that is spherical and can accumulate and enlarge to from larger droplets?
Definition
Lipid droplet
Term
What is the main purpose of cytoplasmic inclusions?
Definition
energy storage
Term
Which component of the cell is involved in cell replication, contains chromatin and serves as the genetic material for directing protein synthesis?
Definition
The nucleus
Term
What is the function of the nuclear envelope?
Definition
Separates the nucleus from the cytoplasm
Term
What are the openings in the nuclear envelope called?
Definition
Nuclear pores
Term
What do nuclear pores allow?
Definition
Selective passage of materials between the cytoplasm and nucleoplasm
Term
What is the combination of DNA and associated proteins called?
Definition
Chromatin
Term
What is the function of chromatin?
Definition
To package DNA into a much smaller volume
Term
Name the order that Chromatin packages.
Definition
1. DNA
2. Nucleosome
3. 30 nm fiber
4. Chromatin
5. Chromosome and chromatids
Term
Describe heterochromatin
Definition
Stains dark, highly coiled and is inactive chromatin
Term
Describe euchromatin
Definition
Stains light, is dispersed and is active in RNA synthesis
Term
Which cell component functions in rRNA transcription and ribosome subunit assembly?
Definition
Nucleolus
Term
What stains very dark and dense when the cell is actively producing protein?
Definition
Nucleolus
Term
Which stage of Mitosis do chromatids first become visible in the nucleus?
Definition
Prophase
Term
Which stage of Mitosis does the nuclear envelope become disintegrated and the mitotic spindles form and the chromatids become arranged in the middle of the cell?
Definition
Metaphase
Term
Which stage of Mitosis do the duplicated chromatids become separated?
Definition
Anaphase
Term
Which stage of Mitosis do the chromosomes begin to uncoil and the nuclear envelope reassembles and the process of cytokines takes place?
Definition
Telophase
Term
List the stages of Mitosis in order
Definition
Prophase
Metaphase
Anaphase
Telophase
Term
Which type of cells are responsible for the renewal of tissue cells?
Definition
Adult stem cells
Term
Which term is described by programmed cell death?
Definition
Apoptosis
Term
Which term is described by the cell or tissue damage due to external factors?
Definition
Necrosis
Term
What could cause apoptosis?
Definition
It is naturally occurring where defective or redundant cells are eliminated
Term
Why does Necrosis happen?
Definition
It is caused by factors external to the cell or tissue such as damage, trauma, infection, or toxins
Term
What is the result of necrosis?
Definition
It would result in premature death of cells and living tissues
Term
Does Apoptosis cause inflammation?
What about necrosis?
Definition
No to apoptosis

Yes to necrosis
Term
Is necrosis detrimental or beneficial?
Definition
Detrimental
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