What Does The Small Circular Structure Indicated By The Letter C Represent?

What does a small circular structure indicated by the letter C represent?

What does the small circular structure indicated by the letter C represent? The mitochondria each have a small circular DNA chromosome that contains genes for several mitochondrial proteins. These proteins are translated within the mitochondria (on the ribosomes indicated by the small red dots).

What process is indicated by C?

What process is indicated by C? exocytosis of secreted proteins. The event indicated by C includes the fusion of a secretory vesiclel with the plasma membrane and the subsequent release of the vesicle contents to the extracelluar space.

What organelle is indicated by the letter c what cellular process occurs here?

The event indicated by C includes the fusion of a secretory vesicle with the plasma membrane and the subsequent release of the vesicle contents to the extracellular space. Structure D is a lysosome which stores enzymes that catalyze the hydrolysis (digestion) of organic cellular materials.

What is the function of the organelle indicated by B?

What is the function of the organelle indicated by B? The Golgi apparatus within the endomembrane system functions in the sorting and modifying of membrane- bound proteins being transported to various cellular locations.

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What is peroxisome and its function?

Peroxisomes are organelles that sequester diverse oxidative reactions and play important roles in metabolism reactive oxygen species detoxification and signaling. Oxidative pathways housed in peroxisomes include fatty acid β-oxidation which contributes to embryogenesis seedling growth and stomatal opening.

What is the function of a lysosome quizlet?

Lysosomes break down lipids carbohydrates and proteins into small molecules that can be used by the rest of the cell. They are also involved in breaking down organelles that have outlived their usefulness.

How would a small nonpolar molecule likely diffuse across a cell membrane?

How would a small nonpolar molecule likely diffuse across a cell membrane? -Nonpolar (or lipid-soluble) molecules dissolve into the phospholipid regions of the cell membrane and will pass with no additional protein transporters required.

What type of protein is indicated by the arrow?

arrow encodes a single-pass transmembrane protein indicating that it may be part of a receptor complex with Frizzled class proteins.

Which of these is most responsible for carrying coded information from the nucleus?

messenger RNA (mRNA) molecule in cells that carries codes from the DNA in the nucleus to the sites of protein synthesis in the cytoplasm (the ribosomes). The molecule that would eventually become known as mRNA was first described in 1956 by scientists Elliot Volkin and Lazarus Astrachan.

What is a ribosomes function?

A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell. The ribosome reads the sequence of the messenger RNA (mRNA) and using the genetic code translates the sequence of RNA bases into a sequence of amino acids.

What do the organelles of the cell do?

Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs such as the heart liver stomach and kidneys serve specific functions to keep an organism alive organelles serve specific functions to keep a cell alive.

What part of the mitochondria is letter B representing?

– B (nucleus) controls cell activities or contains the genetic codes.

What is the function of the organelle indicated by C?

The event indicated by C includes the fusion of a secretory vesicle with the plasma membrane and the subsequent release of the vesicle contents to the extracellular space.

What type of functions does the presence of microvilli typically indicate?

What type of cell functions does the presence of microvilli typically indicate? increase surface area for absorption.

What structure does B represent on the diagram of the plasma membrane?

3. Figure 3.3 is a simplified diagram of the plasma membrane. Structure A repre- sents channel proteins constructing a pore structure B represents an ATP- energized solute pump and structure C is a transport protein that does not depend on energy from ATP.

What do you understand by peroxisome?

Definition of peroxisome

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: a cytoplasmic cell organelle containing enzymes (such as catalase) which act in oxidative reactions and especially in the production and decomposition of hydrogen peroxide.

What is Golgi body function?

A Golgi body also known as a Golgi apparatus is a cell organelle that helps process and package proteins and lipid molecules especially proteins destined to be exported from the cell.

What is cytoplasm function?

Cytoplasm. The cytoplasm is the gel-like fluid inside the cell. It is the medium for chemical reaction. It provides a platform upon which other organelles can operate within the cell. All of the functions for cell expansion growth and replication are carried out in the cytoplasm of a cell.

What is the function of a lysosome?

Lysosomes are membrane-bound organelles with roles in processes involved in degrading and recycling cellular waste cellular signalling and energy metabolism. Defects in genes encoding lysosomal proteins cause lysosomal storage disorders in which enzyme replacement therapy has proved successful.

What is function of a vacuole?

A vacuole is a membrane-bound cell organelle. In animal cells vacuoles are generally small and help sequester waste products. In plant cells vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell.

What is Golgi apparatus quizlet?

Golgi Apparatus. An organelle in eukaryotic cells consisting of stacks of membranous sacs that modify store and ship products of the endoplasmic reticulum.

Why can small hydrophobic molecules cross the membrane?

Molecules that are hydrophobic can easily pass through the plasma membrane if they are small enough because they are water-hating like the interior of the membrane.

Why can generally only very small hydrophobic molecules cross the cell membrane by simple diffusion?

Large polar or ionic molecules which are hydrophilic cannot easily cross the phospholipid bilayer. Charged atoms or molecules of any size cannot cross the cell membrane via simple diffusion as the charges are repelled by the hydrophobic tails in the interior of the phospholipid bilayer.

How do small molecules move into and out of a cell?

Facilitated diffusion like passive diffusion involves the movement of molecules in the direction determined by their relative concentrations inside and outside of the cell. … They then undergo conformational changes that allow the molecule to pass through the membrane and be released on the other side.

Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?

hydrogen bonds

Secondary Protein Structure. α-Helices β-sheets and triple helices are three types of secondary structures. All are formed and stabilized by noncovalent interactions mainly hydrogen bonds.

What does the secondary structure of a protein refer to?

Secondary structure refers to regular recurring arrangements in space of adjacent amino acid residues in a polypeptide chain. It is maintained by hydrogen bonds between amide hydrogens and carbonyl oxygens of the peptide backbone. The major secondary structures are α-helices and β-structures.

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Which protein structure is a result of the folding of the pleated sheets or helices?

Secondary structure refers to the presence of beta pleated sheets and alpha helices within a protein. Tertiary structure refers to a protein’s geometric shape as a result of the interactions between the sidechains of the amino acids in the peptide chain.

What part of DNA provides the code for proteins?

gene

The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons each coding for a single amino acid.

What is the role of DNA molecules in the synthesis of proteins quizlet?

What are proteins made up of? … What role does DNA play in protein synthesis? it controls the order in which the amino acids will be assembled. What makes up a genetic code?

What did Rosalind Franklin contribute to the understanding of DNA molecules?

Rosalind Franklin discovered the density of DNA and more importantly established that the molecule existed in a helical conformation. Her work to make clearer X-ray patterns of DNA molecules laid the foundation for James Watson and Francis Crick’s suggestion that DNA is a double-helix polymer in 1953.

What is the function of nucleolus?

The primary function of the nucleolus is in facilitating ribosome biogenesis through the processing and assembly of rRNA into preribosomal particles.

What is cytoskeleton function?

The cytoskeleton is a structure that helps cells maintain their shape and internal organization and it also provides mechanical support that enables cells to carry out essential functions like division and movement. … Rather several different components work together to form the cytoskeleton.

What is the function of nucleus?

The nucleus controls and regulates the activities of the cell (e.g. growth and metabolism) and carries the genes structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.

How organelle structure relates to its function?

Organisms are composed of cells and these cells have specific structures within in them that allow them to carry out their functions. These structures are called Organelles. Organelles perform different functions within a cell and this is called the Division of Labour. …

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