NEET Exam > NEET Videos > Biology Class 11 > Interphase of Cell Cycle
Interphase of Cell Cycle Video Lecture | Biology Class 11 - NEET
FAQs on Interphase of Cell Cycle Video Lecture - Biology Class 11 - NEET
| 1. What is interphase in the cell cycle? |  |
Ans. Interphase is the longest phase of the cell cycle, during which the cell prepares for division by growing in size, replicating its DNA, and undergoing various metabolic activities. It is divided into three subphases: G1 phase, S phase, and G2 phase.
| 2. How long does interphase last? | |
Ans. The duration of interphase can vary depending on the type of cell and the organism. In most cells, interphase typically lasts for about 90% of the total cell cycle duration. It can range from a few hours to several days, depending on the specific requirements of the cell.
| 3. What happens during the G1 phase of interphase? | |
Ans. The G1 phase is the first subphase of interphase. During this phase, the cell grows in size, synthesizes proteins, and carries out its normal metabolic functions. It also prepares for DNA replication by accumulating the necessary materials and energy.
| 4. What is the significance of the S phase in interphase? | |
Ans. The S phase, or synthesis phase, is the second subphase of interphase. It is characterized by the replication of DNA in the cell's nucleus. Each chromosome is duplicated, resulting in the formation of two identical sister chromatids. The S phase ensures that each daughter cell receives a complete set of genetic information during cell division.
| 5. What happens during the G2 phase of interphase? | |
Ans. The G2 phase is the final subphase of interphase. It follows the S phase and precedes cell division. During this phase, the cell continues to grow and prepare for division. It synthesizes additional proteins and organelles, checks for DNA damage, and ensures that all necessary cellular components are in place for successful cell division.
Text Transcript from Video
0:0:0: let's embark on an incredible journey of
0:0:2: interface in the cell cycle
0:0:4: interface makes up the majority of the
0:0:7: cell cycle and is divided into distinct
0:0:9: subfaces
0:0:11: in this video we will explore each of
0:0:13: its subfaces in detail and understand
0:0:15: their importance in the cell cycle
0:0:18: so let's begin
0:0:21: as we know that the human cell cycle
0:0:23: consists of two distinct phases
0:0:25: interface and in phase
0:0:27: interface is the longer of the two
0:0:29: lasting significantly longer than the M
0:0:32: phase as it is responsible for the
0:0:34: preparation of the cell for division
0:0:37: during interface the cell grows and
0:0:39: replicates its DNA in preparation for
0:0:42: the division that occurs in the end
0:0:43: phase
0:0:44: now let's have a look at both these
0:0:47: phases in detail
0:0:49: since these phases are quite complex we
0:0:52: divide them in substages to understand
0:0:54: them better
0:0:55: let's begin with the interface
0:0:58: first here is an image that depicts the
0:1:1: complete interface in general
0:1:3: as we can see the interface has three
0:1:5: stages G1 phase S phase G2 phase let's
0:1:9: begin each stage step by step
0:1:12: so as the cell enters the first stage of
0:1:15: the interface it's time for the first
0:1:17: Gap phase abbreviated as G1 phase
0:1:21: this phase is the interval between the M
0:1:23: phase of the previous cycle and the S
0:1:25: phase of the current cycle and it's the
0:1:28: first stage of the Preparatory phase
0:1:29: before DNA synthesis
0:1:32: during this phase the cell is still
0:1:34: metabolically active and grows in size
0:1:37: all the organelles duplicate and the
0:1:40: building blocks that will be required in
0:1:42: later stages are made
0:1:44: it's important to note that the G1 phase
0:1:47: does not involve DNA replication
0:1:50: so as the cell prepares for the
0:1:52: following stages its growing duplicating
0:1:54: its organelles and stockpiling materials
0:1:57: for the future
0:1:59: now students to make your preparation
0:2:1: easy and complete you should definitely
0:2:4: check out the notes of all the three
0:2:6: stages of interface
0:2:8: and the good news is eduriff provides
0:2:10: notes of all the chapter in detail
0:2:13: during the second stage of interface
0:2:15: known as the synthesis phase RS phase
0:2:18: and as the name suggests there will be
0:2:20: synthesis of something the nucleus and
0:2:23: its genetic material that is DNA is
0:2:25: synthesized or we can say duplicated in
0:2:28: this phase
0:2:29: but that's not all
0:2:31: there is one more important organelle
0:2:34: that gets duplicated in the S phase
0:2:36: which is centrosome which is a bundle of
0:2:38: threads present in the cell which also
0:2:41: gets duplicated
0:2:42: the centrosome contains smaller
0:2:44: organelles called centrioles made up of
0:2:47: microtubules which help in releasing the
0:2:49: threads required for separating sister
0:2:51: chromatids later
0:2:53: we will have a detailed look at this
0:2:55: process in our upcoming videos for now
0:2:58: all we need to know is that these
0:3:0: threads are important for the cell
0:3:2: division and for this reason duplication
0:3:4: of the bundle containing these threads
0:3:6: is also important
0:3:8: all this happens in the S phase so the S
0:3:11: phase takes up the responsibility of
0:3:13: duplicating the contents inside the
0:3:15: nucleus and the centrosome present in
0:3:17: the cytoplasm
0:3:19: now what's next
0:3:21: the next step in the process of the
0:3:23: interface is the second Gap phase
0:3:25: abbreviated as G to phase this phase
0:3:28: allows the cell to grow more along with
0:3:30: the enlargement in the cell size the
0:3:33: cell also makes more proteins and
0:3:34: organelles
0:3:36: the most important function of this
0:3:38: phase is that It prepares the cell for
0:3:40: mitosis
0:3:42: this phase helps the cell to prepare for
0:3:44: the actual cell division in the end
0:3:46: phase
0:3:47: so now I'll be set to study the next
0:3:50: phase that the ZM face
0:3:52: no not yet because we should know one
0:3:55: more intermediate step which plays an
0:3:57: important role whether the cell is going
0:3:59: to have the M phase or not
0:4:1: now are you curious to know about that
0:4:4: intermediate phase
0:4:6: this is the G naught phase an
0:4:8: intermediate phase between the M phase
0:4:10: that is cell division and the G1 phase
0:4:13: that is growth
0:4:14: also there are two types of G naught
0:4:17: phase equation phase and the senescent
0:4:19: phase
0:4:20: the quiescent phase is when the cell
0:4:22: temporarily stops dividing but can
0:4:25: return to the G1 phase if the external
0:4:27: or internal factors that caused it to
0:4:29: enter the G not phase are removed
0:4:32: on the other hand the senescent phase is
0:4:35: when the cell permanently stops dividing
0:4:38: the G naught phase is a metabolically
0:4:40: active phase where the cell is highly
0:4:43: active but it does not divide further
0:4:46: this phase is determined by a variety of
0:4:48: intrinsic and extrinsic factors such as
0:4:51: resource availability or nutritional
0:4:53: deprivation Etc
0:4:55: let's discuss an example to make you
0:4:58: clear about the G naught phase
0:5:0: so nerve cells are the example which
0:5:3: Entergy not face permanently they remain
0:5:6: metabolically active but do not divide
0:5:8: further in their entire life cycle as
0:5:11: they lack centrioles
0:5:13: so now you know what happens when a cell
0:5:15: stops dividing
0:5:17: fascinating isn't it
0:5:20: in our next video we will explore the
0:5:22: second phase of this fascinating process
0:5:24: of cell cycle the M phase
0:5:27: we will go over all the details and
0:5:30: explain everything you need to know in
0:5:32: an easy to understand way
0:5:34: so get ready to explore the M phase and
0:5:37: the Mysteries it holds we hope that you
0:5:40: have understood the topic
0:5:42: and now you should start studying this
0:5:44: chapter with the edurev app as you get
0:5:46: with your lectures notes variety of
0:5:49: questions and McQ tests for all the
0:5:52: chapters of each subject
0:5:54: it's like having the entire School in
0:5:56: your pocket
0:0:2: interface in the cell cycle
0:0:4: interface makes up the majority of the
0:0:7: cell cycle and is divided into distinct
0:0:9: subfaces
0:0:11: in this video we will explore each of
0:0:13: its subfaces in detail and understand
0:0:15: their importance in the cell cycle
0:0:18: so let's begin
0:0:21: as we know that the human cell cycle
0:0:23: consists of two distinct phases
0:0:25: interface and in phase
0:0:27: interface is the longer of the two
0:0:29: lasting significantly longer than the M
0:0:32: phase as it is responsible for the
0:0:34: preparation of the cell for division
0:0:37: during interface the cell grows and
0:0:39: replicates its DNA in preparation for
0:0:42: the division that occurs in the end
0:0:43: phase
0:0:44: now let's have a look at both these
0:0:47: phases in detail
0:0:49: since these phases are quite complex we
0:0:52: divide them in substages to understand
0:0:54: them better
0:0:55: let's begin with the interface
0:0:58: first here is an image that depicts the
0:1:1: complete interface in general
0:1:3: as we can see the interface has three
0:1:5: stages G1 phase S phase G2 phase let's
0:1:9: begin each stage step by step
0:1:12: so as the cell enters the first stage of
0:1:15: the interface it's time for the first
0:1:17: Gap phase abbreviated as G1 phase
0:1:21: this phase is the interval between the M
0:1:23: phase of the previous cycle and the S
0:1:25: phase of the current cycle and it's the
0:1:28: first stage of the Preparatory phase
0:1:29: before DNA synthesis
0:1:32: during this phase the cell is still
0:1:34: metabolically active and grows in size
0:1:37: all the organelles duplicate and the
0:1:40: building blocks that will be required in
0:1:42: later stages are made
0:1:44: it's important to note that the G1 phase
0:1:47: does not involve DNA replication
0:1:50: so as the cell prepares for the
0:1:52: following stages its growing duplicating
0:1:54: its organelles and stockpiling materials
0:1:57: for the future
0:1:59: now students to make your preparation
0:2:1: easy and complete you should definitely
0:2:4: check out the notes of all the three
0:2:6: stages of interface
0:2:8: and the good news is eduriff provides
0:2:10: notes of all the chapter in detail
0:2:13: during the second stage of interface
0:2:15: known as the synthesis phase RS phase
0:2:18: and as the name suggests there will be
0:2:20: synthesis of something the nucleus and
0:2:23: its genetic material that is DNA is
0:2:25: synthesized or we can say duplicated in
0:2:28: this phase
0:2:29: but that's not all
0:2:31: there is one more important organelle
0:2:34: that gets duplicated in the S phase
0:2:36: which is centrosome which is a bundle of
0:2:38: threads present in the cell which also
0:2:41: gets duplicated
0:2:42: the centrosome contains smaller
0:2:44: organelles called centrioles made up of
0:2:47: microtubules which help in releasing the
0:2:49: threads required for separating sister
0:2:51: chromatids later
0:2:53: we will have a detailed look at this
0:2:55: process in our upcoming videos for now
0:2:58: all we need to know is that these
0:3:0: threads are important for the cell
0:3:2: division and for this reason duplication
0:3:4: of the bundle containing these threads
0:3:6: is also important
0:3:8: all this happens in the S phase so the S
0:3:11: phase takes up the responsibility of
0:3:13: duplicating the contents inside the
0:3:15: nucleus and the centrosome present in
0:3:17: the cytoplasm
0:3:19: now what's next
0:3:21: the next step in the process of the
0:3:23: interface is the second Gap phase
0:3:25: abbreviated as G to phase this phase
0:3:28: allows the cell to grow more along with
0:3:30: the enlargement in the cell size the
0:3:33: cell also makes more proteins and
0:3:34: organelles
0:3:36: the most important function of this
0:3:38: phase is that It prepares the cell for
0:3:40: mitosis
0:3:42: this phase helps the cell to prepare for
0:3:44: the actual cell division in the end
0:3:46: phase
0:3:47: so now I'll be set to study the next
0:3:50: phase that the ZM face
0:3:52: no not yet because we should know one
0:3:55: more intermediate step which plays an
0:3:57: important role whether the cell is going
0:3:59: to have the M phase or not
0:4:1: now are you curious to know about that
0:4:4: intermediate phase
0:4:6: this is the G naught phase an
0:4:8: intermediate phase between the M phase
0:4:10: that is cell division and the G1 phase
0:4:13: that is growth
0:4:14: also there are two types of G naught
0:4:17: phase equation phase and the senescent
0:4:19: phase
0:4:20: the quiescent phase is when the cell
0:4:22: temporarily stops dividing but can
0:4:25: return to the G1 phase if the external
0:4:27: or internal factors that caused it to
0:4:29: enter the G not phase are removed
0:4:32: on the other hand the senescent phase is
0:4:35: when the cell permanently stops dividing
0:4:38: the G naught phase is a metabolically
0:4:40: active phase where the cell is highly
0:4:43: active but it does not divide further
0:4:46: this phase is determined by a variety of
0:4:48: intrinsic and extrinsic factors such as
0:4:51: resource availability or nutritional
0:4:53: deprivation Etc
0:4:55: let's discuss an example to make you
0:4:58: clear about the G naught phase
0:5:0: so nerve cells are the example which
0:5:3: Entergy not face permanently they remain
0:5:6: metabolically active but do not divide
0:5:8: further in their entire life cycle as
0:5:11: they lack centrioles
0:5:13: so now you know what happens when a cell
0:5:15: stops dividing
0:5:17: fascinating isn't it
0:5:20: in our next video we will explore the
0:5:22: second phase of this fascinating process
0:5:24: of cell cycle the M phase
0:5:27: we will go over all the details and
0:5:30: explain everything you need to know in
0:5:32: an easy to understand way
0:5:34: so get ready to explore the M phase and
0:5:37: the Mysteries it holds we hope that you
0:5:40: have understood the topic
0:5:42: and now you should start studying this
0:5:44: chapter with the edurev app as you get
0:5:46: with your lectures notes variety of
0:5:49: questions and McQ tests for all the
0:5:52: chapters of each subject
0:5:54: it's like having the entire School in
0:5:56: your pocket
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