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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Importance and Snapshot of Cell Cycle and Cell Division - Study ref# 764
Introduction: Are you aware that all organisms, even the largest, start their life from a single cell? You may wonder how a single cell then goes on to form such large organisms. Growth and reproduction are characteristics of cells, in...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Importance and Snapshot of Cell Cycle and Cell Division - Study ref# 765
Following sections must be covered to understand the Cell Cycle and Cell Division: 1. Cell Cycle 2. M Phase 3. Significance of Mitosis 4. Meiosis 5. Significance of Meiosis...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Target Setup for Cell Cycle and Cell Division - Study ref# 766
Student requires to achieve the following milestones to get better grip over Cell Cycle And Cell Division. The milestones / targets are as follows:Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter ...
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NEET - Grade 11 - Biology - Biological Classification - Study ref# 3480
Explain reproduction in fungi. Answer: Reproduction in fungi can take place by vegetative means, like – fragmentation, fission and budding.Asexual reproduction is by spores called conidia or sporangiospores or zoospores and sexual reproduction is by ...
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NEET - Grade 11 - Biology - Plant Kingdom - Study ref# 3537
How do algae multiply? What are the three types of fusion? Define each. How are algae beneficial? Answer: The algae reproduction by:–Vegetative method, asexual method and sexual method.Vegetative reproduction - In this method new plants are produc...
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NEET - Grade 11 - Biology - Plant Kingdom - Study ref# 3541
Mosses help prevent soil erosion how? What are the two types of bryophytes? Describe reproduction in bryophytes with appropriate description of sex organs. Answer: Mosses have a great ecological importance as they help to prevent soil erosion. The p...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4221
How anaphase of mitosis differ from the anaphase I of meiosis? Answer: In anaphase I Kinetochore microtubules shorten, severing the recombination nodules and pulling homologous chromosomes apart. Since each chromosome only has one kinetochore, whole ...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4222
Differentiate between plant mitosis and animal mitosis? Answer: Plant MitosisAnimal MitosisOccurs in the maintenance region.Several places in the animal body.Cell shape is same prior to mitosis.Cells becomes spherical prior to mitosis.Centrioles are ...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4223
What is cytokinesis? How does it take place in animals and plant cells? Answer: Cytokinesis is the process in which the cell actually divides into two. With the two nuclei already at opposite poles of the cell, the cell cytoplasm separates, and the c...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4224
What is synapsis and synaptonemal complex? Answer: In prophase I of meiosis, the replicated homologous pair of chromosomes comes together in the process called synapsis, and SECTIONS of the chromosomes are exchanged. The synaptonemal complex is a pro...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4225
Write down the characteristic feature of Metaphase-I? Answer: Metaphase - I :There is formation of a bipolar spindle body.It has two types of spindle fibers:(a) Continuous fibers extending from pole to pole and(b) Chromosomal fibers extending f...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4226
Write down the significance of Mitosis? Answer: Significance of Mitosis:1) Growth: The number of cells within an organism increases by mitosis and this is the basis of growth in multicellular organisms.2) Cell Replacement: Cells are constant...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4227
Write a short note on karyotyping? Answer: Chromosome analysis or karyotyping is a test that evaluates the number and structure of a person's chromosomes in order to detect abnormalities. Chromosomes are thread-like structures within each cell nucleu...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4228
What abnormities can be determine using karyotyping? Answer: 1) extra chromosomes2) missing chromosomes3) missing portions of a chromosome4) extra portions of a chromosome5) portions that have broken off of one chromosome and reattached to another....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4229
Difference between Mitosis and meiosis? Answer: MitosisMeiosisAsexual ReproductionSexual ReproductionGenetically similar cellsCells are genetically differentNo crossing over.Crossing over takes place.Only one division takes placeTwo division takes pl...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4230
What is cell division? Answer: Cell division is a process by which a cell, called the parent cell, divides into two cells, called daughter cells. Cell division is usually a small segment of a larger cell CYCLE. In meiosis however, a cell is permanent...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4231
What is cell cycle? Answer: The cell CYCLE, or cell-division cycle, is the series of events that take place in an eukaryotic cell between its formation and the moment it replicates itself. These events can be divided in two main parts: interphase ...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4232
Name two major types of cell division? Answer: Two major types of cell division are Mitosis and Meiosis....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4233
Why mitosis is called equational division? Answer: In mitosis the number of chromosomes in parent cell and daughter cell are equal....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4234
What is metaphase plate? Answer: The plane of alignment of the centromeres of all the chromosomes at metaphase plate is known as metaphase plate....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4235
Name the stage of mitosis when the chromosomes commence their pole ward movement? Answer: During anaphase the chromosomes commence their pole ward movement....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4236
What indicates the beginning of diplotene? Answer: The chiasmata formation marks the beginning of diplotene....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4237
What are chiasmata? Answer: The X like configuration that helps in exchanging genetic materials between the chromosomes is known as chiasmata....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4238
What are dyads? Answer: During Cytokinesis two daughter cells are formed which are called dyads....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4239
What is the G0 phase of cell cycle? Answer: Certain cells which do not divide enters into an inactive stage called G0 phase....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4240
What are kinetochores? Answer: They are small disc shaped structure at the surface of the centromeres, they serve as the sites of attachment of the spindle fibers to the chromosomes....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4241
What is interkinesis? Answer: It is similar to short interphase between meiosis I and meiosis I I where no replication of DNA occurs....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4242
Mention the events that occurs during Diakinesis? Answer: The chiasmata move up to the terminals and the chromosomes are fully condensed. The nucleolus and the nuclear envelope disappear and the spindle formation starts....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4243
What is the significance of meiosis? Answer: It ensures the maintaince of constant chromosome numbers GENERATION after generation. The crossing over results in the variation of genetic characters in the off springs....
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4244
Write the key features of the cell in metaphase stage? Answer: The centrosomes are at opposite poles of the cell. The chromosomes, now at their most highly coiled and condensed, become arranged on a plane equidistant from the two poles called the met...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4245
Describe with diagram Leptotene and Zygotene? Answer: Leptotene (Leptonema): Chromosomes become visible as long slender threads bearing numerous bead-like nucleosomes (chromomeres). These are arranged in a linear fashion along their lengths. The n...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4246
Describe with diagram Diplotene, Pachytene and Diakinesis? Answer: Pachytene (Pachynema): This is the most important stage in meiosis in which a recombination of characters (genes) takes place through a phenomenon called crossing over.The chromoso...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4247
Describe the different stages of cell cycle? Answer: M phase The cell CYCLE of a typical eukaryotic cell has four phases. The relatively brief M phase consists of nuclear division (mitosis) and cytoplasmic division (cytokinesis). After M phase, the d...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4248
What are cis and trnas face of golgi? Answer: The golgi apparatus is usually located near the cell nucleus. It is composed of a series of layers called golgi stacks. Proteins from the ER always enter and exit the golgi apparatus from the same locatio...
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NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4249
Describe different phases of Second meiotic division? Answer: Second meiotic division (Meiosis-II)Second meiotic division is similar to mitosis i.e. it is an equational division in which there is duplication of the chromosomes. The two nuclei formed ...
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