What is the name of the membrane that delimits the nucleus ?

What is the name of the membrane that delimits the nucleus ?
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To which component of the cell structure that membrane is contiguous? The nuclear membrane is also called karyotheca. The nuclear membrane is continuous to the endoplasmic reticulum membrane.    
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Lysosomes arise from, (A) Nucleus (B) Endoplasmic reticulum (C) Golgi apparatus (D) Cell membrane

Description : Lysosomes arise from, (A) Nucleus (B) Endoplasmic reticulum (C) Golgi apparatus (D) Cell membrane

Last Answer : (C) Golgi apparatus

Cells are commonly studied in the lab. If you were examining various unlabelled slides of cells under the microscope, you could tell if the cell was from a plant by the presence of (A) A nucleus (B) A cell membrane (C) Cytoplasm (D) A cell wall

Description : Cells are commonly studied in the lab. If you were examining various unlabelled slides of cells under the microscope, you could tell if the cell was from a plant by the presence of (A) A nucleus (B) A cell membrane (C) Cytoplasm (D) A cell wall

Last Answer : (D) A cell wall

The structure within a cell that distinguishes the cell as being eukaryotic, and prokaryotic is (A) Ribosomes (B) Cell membrane (C) Cell wall (D) Nucleus

Description : The structure within a cell that distinguishes the cell as being eukaryotic, and prokaryotic is (A) Ribosomes (B) Cell membrane (C) Cell wall (D) Nucleus

Last Answer : (D) Nucleus

Do all eukaryotic cells have nucleus and only one nucleus ?

Description : Do all eukaryotic cells have nucleus and only one nucleus ?

Last Answer : There are eukaryotic cells without nucleus and others with more than one nucleus. Osteoclasts, the cells responsible for resorption of the osseous matrix, for example, are multinucleate cells; ... cells. Cell Nucleus Review - Image Diversity: cell nucleus miltinucleate cells enucleated cells

How are cells with delimited nucleus called ?

Description : How are cells with delimited nucleus called ?

Last Answer : What are the main elements of the nucleus? Cells with delimited nucleus are called eukaryotic cells. Organisms composed of one or more eukaryotic cells are called eukaryotes. The mains elements of the ... the nucleolus, the karyolymph, or nucleoplasm, and the nuclear membrane (or karyotheca).

How is the fluid that fills the nucleus called ?

Description : How is the fluid that fills the nucleus called ?

Last Answer : The aqueous fluid that fills the nuclear region is called karyolymph, or nucleoplasm. In the fluid there are proteins, enzymes and other important substances for the nuclear metabolism.

What are the main structures within the cell nucleus ?

Description : What are the main structures within the cell nucleus ?

Last Answer : Within the cell nucleus the main structures are: the nucleolus, an optically dense region, spherical shaped, where there are concentrated ribosomal RNA (rRNA) associated to proteins (there may be ... cell interphase; the karyotecha, or nuclear membrane, the membrane that delimits the nucleus.

Concerning the presence of nucleus what is the difference between animal and bacterial cells ?

Description : Concerning the presence of nucleus what is the difference between animal and bacterial cells ?

Last Answer : Animal cells (cells of living beings of the kingdom Animalia) have an interior membrane that delimits a cell nucleus and thus they are eukaryotic cells; in these cells the genetic material is located ... so they are prokaryotic cells and their genetic material is found dispersed in the cytosol.

Do bacteria cells have nucleus ?

Description : Do bacteria cells have nucleus ?

Last Answer : In bacteria the genetic material is dispersed in the cytosol and there is no internal membrane that delimits a nucleus.

During mitosis, the eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. Mitosis progresses through five separate morphologically distinct phases. Name, in order, these five phases of mitosis.

Description : During mitosis, the eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. Mitosis progresses through five separate morphologically distinct phases. Name, in order, these five phases of mitosis.

Last Answer : Prophase, prometaphase, metaphase, anaphase, and telophase.

Robert Brown is well known for his discovery of (A) Chloroplast (B) Photometer (C) Nucleus (D) Nucleolus

Description : Robert Brown is well known for his discovery of (A) Chloroplast (B) Photometer (C) Nucleus (D) Nucleolus

Last Answer : (C) Nucleus

The largest organelle in a mature living plant cell is the (A) Chloroplast (B) Nucleus (C) Central vacuole (D) Dictyosomes

Description : The largest organelle in a mature living plant cell is the (A) Chloroplast (B) Nucleus (C) Central vacuole (D) Dictyosomes

Last Answer : (C) Central vacuole

Which of the following correctly matches an organelle with its function? (A) Mitochondrion . . . photosynthesis (B) Nucleus . . . cellular respiration (C) Ribosome . . . manufacture of lipids (D) Central vacuole . . . storage

Description : Which of the following correctly matches an organelle with its function? (A) Mitochondrion . . . photosynthesis (B) Nucleus . . . cellular respiration (C) Ribosome . . . manufacture of lipids (D) Central vacuole . . . storage

Last Answer : (D) Central vacuole . . . storage

What is mass transportation across the cell membrane ?

Description : What is mass transportation across the cell membrane ?

Last Answer : Mass transportation is the entrance or the exiting of substances in or from the cell engulfed by portions of membrane. The fusion of internal substance-containing membranous vesicles with the cell ... cell after they have been engulfed by projections of the membrane is called endocytosis.

How does the sodium-potassium pump present in the cell membrane work ?

Description : How does the sodium-potassium pump present in the cell membrane work ?

Last Answer : What is the importance of this protein for the cell? The sodium-potassium pump is the transport protein that maintains the concentration gradient of these ions between the intra and the ... maintain the cellular metabolism. Cell Membrane Review - Image Diversity: sodium-potassium pump

What are differentiations of the cell membrane ?

Description : What are differentiations of the cell membrane ?

Last Answer : In some types of cells, the cell membrane present differentiations that are necessary for the specific functions of the cells. The main differentiations are the microvilli and the structures for ... tight junctions (zonula occludens), zonula adherens (adherens junctions) and gap junctions.

What are the basic constituents of the cell membrane ?

Description : What are the basic constituents of the cell membrane ?

Last Answer : The cell membrane is formed of lipids, proteins and carbohydrates. The membrane lipids are phospholipids, a special type of lipid to which one extremity a phosphate group is bound thus ... cell membrane. Cell Membrane Review - Image Diversity: phospholipid bilayer membrane proteins glycocalyx

Concerning permeability what type of membrane is the cell membrane ?

Description : Concerning permeability what type of membrane is the cell membrane ?

Last Answer : The cell membrane is a selectively permeable membrane, i.e., it allows the passage of water and some selected solutes. Cell Membrane Review - Image Diversity: cell membrane

What is a membrane ?

Description : What is a membrane ?

Last Answer : Membrane is any delicate sheet that separates one region from other blocking or permitting (selectively or completely) the passage of substances. The skin, for example, can be considered a membrane ... body; cellophane, used in chemical laboratories to separate solutions, acts as membrane too.

What is the difference between plasma membrane and cell wall ?

Description : What is the difference between plasma membrane and cell wall ?

Last Answer : Plasma membrane and cell wall is not the same thing. Plasma membrane, also called cell membrane, is the outer membrane common to all living cells and it is made of a phospholipid bilayer, ... made of peptidoglycans and other organic substances. Cell Structure Review - Image Diversity: cell wall

What are the chemical substances that compose the plasma membrane ?

Description : What are the chemical substances that compose the plasma membrane ?

Last Answer : The main constituents of the plasma membrane are phospholipids, proteins and carbohydrates. The phospholipds, amphipathic molecules, are regularly organized in the membrane according to their polarity: two layers of ... bound to proteins and to phospholipids in the outer face of the membrane.

What is the plasma membrane of the cell ?

Description : What is the plasma membrane of the cell ?

Last Answer : What are its main functions? The plasma membrane is the outer membrane of the cell it delimits the cell itself and a cell interior with specific conditions for the cellular function. Since it ... passage of substances inwards or outwards. Cell Structure Review - Image Diversity: cell membrane

The electron transport chain within the inner mitochondrial membrane creates a gradient of ____________ across the inner membrane which is utilized to drive the activity of ATP synthase and the generation of ATP.

Description : The electron transport chain within the inner mitochondrial membrane creates a gradient of ____________ across the inner membrane which is utilized to drive the activity of ATP synthase and the generation of ATP.

Last Answer : Hydrogen (H+ ions) or protons

Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell membrane, nuclear envelope, endoplasmic reticulum, the Golgi apparatus, and lysosomes. Name a cellular component whose membrane is not part of the endomembrane system.

Description : Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell ... . Name a cellular component whose membrane is not part of the endomembrane system.

Last Answer : Mitochondria; also chloroplasts

What characteristic of the plasma membrane allows selective molecules to pass through it?

Description : What characteristic of the plasma membrane allows selective molecules to pass through it?

Last Answer : It is semi-permeable.

Peroxisomes and Glyoxisomes are (A) Energy transducers (B) Membrane-less organelles (C) Micro bodies (D) Basal bodies

Description : Peroxisomes and Glyoxisomes are (A) Energy transducers (B) Membrane-less organelles (C) Micro bodies (D) Basal bodies

Last Answer : (C) Micro bodies

The chloroplast develop from (A) ER (B) Golgi complex (C) Nuclear membrane (D) Proplastids

Description : The chloroplast develop from (A) ER (B) Golgi complex (C) Nuclear membrane (D) Proplastids

Last Answer : (D) Proplastids

″Proteins icebergs in a sea of lipids” is stated by (A) Lamellar Model (B) Unit-membrane Model (C) Fluid-Mosaic model (D) Micellar Model

Description : ″Proteins icebergs in a sea of lipids” is stated by (A) Lamellar Model (B) Unit-membrane Model (C) Fluid-Mosaic model (D) Micellar Model

Last Answer : (C) Fluid-Mosaic model

The matrix surrounding the grana in the inner membrane of chloroplasts is (A) Cytosol (B) Frets (C) Stroma (D) Inter-granal lamellae

Description : The matrix surrounding the grana in the inner membrane of chloroplasts is (A) Cytosol (B) Frets (C) Stroma (D) Inter-granal lamellae

Last Answer : (C) Stroma

Infoldings of inner membrane in mitochondria are called (A) Grana (B) Thyallkoids (C) Cristae (D) Frets

Description : Infoldings of inner membrane in mitochondria are called (A) Grana (B) Thyallkoids (C) Cristae (D) Frets

Last Answer : (C) Cristae

The outer most layer of cell wall is (A) Primary wall (B) Secondary wall (C) Middle lamella (D) Plasma membrane

Description : The outer most layer of cell wall is (A) Primary wall (B) Secondary wall (C) Middle lamella (D) Plasma membrane

Last Answer : (C) Middle lamella

Which of the following would you NOT find in a bacterial cell (A) DNA (B) Cell membrane (C) Golgi apparatus (D) Ribosomes

Description : Which of the following would you NOT find in a bacterial cell (A) DNA (B) Cell membrane (C) Golgi apparatus (D) Ribosomes

Last Answer : (C) Golgi apparatus

What part of the cell serves as the intracellular highway? (A) Endoplasmic reticulum (B) Golgi apparatus (C) Cell membrane (D) Mitochondria

Description : What part of the cell serves as the intracellular highway? (A) Endoplasmic reticulum (B) Golgi apparatus (C) Cell membrane (D) Mitochondria

Last Answer : (A) Endoplasmic reticulum

Which of the following cell part is described as a "fluid mosaic"? (A) Chloroplast (B) Vacuole (C) Cell membrane (D) Endoplasmic reticulum

Description : Which of the following cell part is described as a "fluid mosaic"? (A) Chloroplast (B) Vacuole (C) Cell membrane (D) Endoplasmic reticulum

Last Answer : (C) Cell membrane

Plant cells contain the following 3 things not found in animal cells _________, _____________ and ______________. (A) Plastids / Chlorophyll / Membrane (B) Chloroplast / Cell wall / Golgi body (C) Plastids / Cell wall / Chlorophyll (D) Mitochondria / Cell wall /

Description : Plant cells contain the following 3 things not found in animal cells _________, _____________ and ______________. (A) Plastids / Chlorophyll / Membrane (B) Chloroplast / Cell wall / Golgi body (C) Plastids / Cell wall / Chlorophyll (D) Mitochondria / Cell wall /

Last Answer : (C) Plastids / Cell wall / Chlorophyll

A semi permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side of the chamber. Which of the following will happen? (A) Water will move toward the right side (B) salt will move toward the right side (C) Water will move toward the left side (D) salt will move toward the left side

Description : A semi permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side of the chamber. Which of the following will ... right side (C) Water will move toward the left side (D) salt will move toward the left side

Last Answer : (C) Water will move toward the left side

The door to your house is like the __________________ of a cell membrane? (A) Phospholipid bilayer (B) Integral protein (C) Recognition protein (D) Peripheral protein

Description : The door to your house is like the __________________ of a cell membrane? (A) Phospholipid bilayer (B) Integral protein (C) Recognition protein (D) Peripheral protein

Last Answer : (B) Integral protein

Lysosomes have (A) Single-layered membrane (B) Double-layered membrane (C) Three-layered membrane (D) No membrane

Description : Lysosomes have (A) Single-layered membrane (B) Double-layered membrane (C) Three-layered membrane (D) No membrane

Last Answer : (A) Single-layered membrane

The intake of solid food by infloding of cell membrane is called (A) Exocytosis (B) Pinocytosis (C) Phagocytosis (D) Both B and C

Description : The intake of solid food by infloding of cell membrane is called (A) Exocytosis (B) Pinocytosis (C) Phagocytosis (D) Both B and C

Last Answer : (C) Phagocytosis

Can two normal individuals of the same species with sexual reproduction have identical genomes and identical karyotypes ? How the human karyotype is usually represented?

Description : Can two normal individuals of the same species with sexual reproduction have identical genomes and identical karyotypes ? How the human karyotype is usually represented?

Last Answer : Except for clones (individuals created from nucleus transplantation, like the Dolly sheep) and monozygotic twins, it is very improbable the genomes of two individuals of the same species and generated by sexual ... normal karyotype is represented by the formula 44+XX for women and 44+XY for men.

What is the difference between the concepts of karyotype and genome ?

Description : What is the difference between the concepts of karyotype and genome ?

Last Answer : Genome is the set of DNA molecules that characterizes each living being or each species. The concept then includes the specific nucleotide sequence of the DNA molecules of each individual or species. ... of each chromosome or pair of homologous. Cell Nucleus Review - Image Diversity: karyotype

What are homologous chromosomes ?

Description : What are homologous chromosomes ?

Last Answer : Which are the human cells that do not have homologous chromosomes? Chromosomes contain genes (genetic information in the form of nucleotide sequences) that command the protein synthesis thus ... chromosomes are the gametes since during meiosis the homologous chromosomes are separated.

What are the primary and the secondary constrictions of a chromosome ?

Description : What are the primary and the secondary constrictions of a chromosome ?

Last Answer : What is the other name given to the secondary constriction? Primary constriction is the narrower region of a condensed chromosome where the centromere, the structure that unites identical chromatids, is located. ... can be one or more in chromosome) is called nucleolus organizer region (NOR).

How the chromosome region where the centromere is located is called ?

Description : How the chromosome region where the centromere is located is called ?

Last Answer : How are chromosomes classified in relation to the position of their centromere? The chromosome region where the centromere is located is called primary constriction. In microscopic view ... constriction the chromosomes are classified as telocentric, acrocentric, submetacentric or metacentric.

What is the structure that maintains identical chromatids bound ?

Description : What is the structure that maintains identical chromatids bound ?

Last Answer : The structure that maintains identical chromatids bound is the centromere. Cell Nucleus Review - Image Diversity: centromere

How are the concepts of chromosome ?

Description : How are the concepts of chromosome ?

Last Answer : chromatin and chromatids related? In which phase of the cell cycle does DNA duplicate? Chromatin is a set of filamentous DNA molecules dispersed in the karyoplasm forming euchromatin and heterochromatin ... chromosomes (and not only one). Cell Nucleus Review - Image Diversity: chromatids

In the phase when the cell is not dividing ?

Description : In the phase when the cell is not dividing ?

Last Answer : interphase) is there activity within the cell nucleus? In the interphase there is intense metabolic activity in the cell nucleus: DNA is duplicating, euchromatin is being transcript and RNA is produced.

What is the relation between the concepts of chromatin and chromosome ?

Description : What is the relation between the concepts of chromatin and chromosome ?

Last Answer : Are euchromatin and heterochromatin part of chromosomes? Every filament of chromatin is a complete DNA molecule (a complete double helix), i.e., a complete chromosome. A DNA molecule may form ... thus both are part of chromosomes. Cell Nucleus Review - Image Diversity: chromosome structure

What are heterochromatin and euchromatin ?

Description : What are heterochromatin and euchromatin ?

Last Answer : Chromatin is uncondensed nuclear DNA, the typical DNA morphology in interphase (the phase of the cell cycle in which the cells is not dividing itself). In this phase of the cell cycle ... inactive portions of the DNA molecule. Cell Nucleus Review - Image Diversity: heterochromatin euchromatin

What are some biological examples in which lysosomic enzymes play fundamental role ?

Description : What are some biological examples in which lysosomic enzymes play fundamental role ?

Last Answer : The remodelation of the osseous tissue, the function of acrosomes in sperm cells and the elimination of the tadpole tail are examples of biological processes in which lysosomic enzymes are key factors. The ... cell by its own mechanisms is called autolysis, a type of apoptosis (celll suicide).