hi friends hope you are fine in this video we have 30 questions on cell cycle mitosis and meosis without wasting a second let's begin which of the following is the longest stage in the cell cycle options are a anaas b propas c metapas d interace you have 10 seconds to answer the correct answer is interface interface is the longest phase consists of G1 s and G2 phase and this is a score card please comment your score at the end question number two what is the primary purpose of mitosis options are to produce genetic diversity to
replicate DNA to divide the nucleus and its condense to facilitate cellular respiration correct answer is to divide the nucleus and its contents in myos the main purpose of mitosis is to divide the nucleus and its condence equally between two daughter cells ensuring that each cell receives a complete set of chromosomes question number three during which phase of cell cycle does DNA replication occur options are a G1 phase B S phase C G2 phase d m phase correct answer is S phase DNA replication takes place during the S phase of the cell cycle during this phase
the cell duplicates its genetic material in preparation for mitosis or cell division question number four what is the correct order of the faces in the cell cycle options are a G1 s G2 m b mg1 sg2 c sg2 mg1 D G2 msg1 the correct answer is G1 s g2m and that is the order of the phases in the cell cycle this sequence ensures that the cell grows replicates its DNA in S phase and prepares for division before undergoing mitosis in G2 phase question number five what is the role of cyclines in the cell cycle option
A to repair damage DNA option b to regulate the progression of the cell cycle option C to provide energy for cell division option D to facilitate protein synthesis the correct answer is to regulate the progression of the cell cycle cyclins are proteins that Bine to and activate cycling dependent kinases or cdks which are essential for the progression of the cell cycle it help regulate the timing and Order of the various phes question number six which of the following checkpoints occurs during the G1 phase options are a DNA damage checkpoint option b spindle assembly checkpoint option
C DNA replication checkpoint option D G2 checkpoint the correct answer is DNA damage checkpoint DNA damage checkpoint occurs during the G1 phase of cell cycle ensuring that DNA damage is repaired before the cell proceeds to the S phase and replicates its DNA question number seven how many chromosomes are present in a human somat cell after mitosis options are a 23 b46 c92 d24 correct answer is B 46 human somatic cells are deployed that means they have two sets of chromosomes that is 46 chromosomes after mitosis each totter cell will receive a complete set of 46
chrom chromosomes question number eight what is the main difference between mitosis and meiosis option A mitosis produces two genetically identical cells while meosis produces four genetically distinct cells B mitosis occurs in gametes while meosis occurs in somatic cells C mitosis involves two rounds of division while meosis involves one and D mitosis produce haid cells while meiosis produce diploid cells the correct answer is mitosis produces two genetically identical cells while meiosis produces four genetically distinct cells question number nine what is the purpose of metaphase plate during mitosis option A to separate sister chromatids option b to
align chromosomes for separation option C to replicate DNA option D to form the nuclear envelope the correct answer is to align chromosomes for separation metaphase plate as you see here it is an imaginary line at the center of the cell this alignment ensures that chromosomes are properly positioned for separation during an AAS question number 10 during which phase of meiosis does crossing over occur options are a proas 1 B metaphase 1 c anaas 1 d tilas 2 the correct answer is proace one crossing over is the exchange of genetic material between non-sister chromatids of homologous
chromosomes that occurs during propas one of meosis this process increases genetic diversity question number 11 what is the outcome of meosis option A two deployed daughter cells option b four hloy gametes option C one deployed cell option D two haid cells the answer is four haid gametes the outcome of meosis is for genetically distinct hloy tot cells or cites as you see here question number 12 which of the following processes increases genetic diversity during meiosis option a DNA replication option b cytokinesis option C crossing over option D chromosome segregation the answer is crossing over crossing
over during prophase one of meosis increases genetic diversity by exchange of segments between non-sister chromatids of homologous chromosomes this creates new combinations of alyses in the resulting cetes thus increases genetic diversity question number 13 what structure holds sister chromatids together option a centromere option b Kinto cor option C chromatin option D spindle fibers the answer is centromere centromere as you see here it is a structure that holds the sister chromatids together until they are separated during an AAS it is a constricted region where the Kinto assemble and where the spindle fibers attach to the chromosomes
question number 14 which phase of mitosis is characterized by the alignment of chromosomes along the equatorial plane options are a propas b metapas c anaas d tilas the answer is metaphase during metaphase of mitosis the chromosomes align along the metaphase plate which is an imaginary line at the equatorial plane of the cell as you see here question number 15 15 what is the primary function of spindle apparatus option A to replicate DNA option b to separate chromosomes during cell division option C to synthesize proteins option D to form the nuclear envelope the correct answer is
to separate chromosomes during cell division the spindal fibers attach to the kyto cores of the chromosomes and pull the sister chromatids apart during anaas ensuring that each daughter cell receives a complete set of chromosomes as you see in this figure question number 16 what's the main difference between anaas 1 of meiosis and anaphase of mitosis option A anaes one separates sister chromatids while anaphes separates homologous chromosomes option b anaas one separates homologous chromosomes while anaas of mitosis separates sister chromatids option C anaas one occurs in somatic cells while anaas of mitosis occurs in cetes option
D there is no difference they are the same process the answer is anaas one separates homologous chromosomes while anaphase separates sister chromatids as you see here this is is a separation of sister chromatids that is happening in mitosis where homologous chromosomes are separated in the anaas one of iosis question number 17 what is the role of the G2 checkpoint options are a to ensure DNA is replicated correctly B to check for spinal B to check for spindal fiber formation C to assess cell size and nutrient availability D to monitor chromosome alignment the correct answer is
to assess cell size and nutrient availability the G2 checkpoint ensures that the cell has grown to an appropriate size and has sufficient nutrients and growth factors to proceed with cell division and also checks for any DNA damage question number 18 what's the term for the physical division of cytoplasm during cell division option A mitosis option b cyto minosis option C interphase option D telophase the answer is cyto minosis it is a physical division of the cytoplasm after mitosis or meosis it results in the formation of two or more doter cells each with its own nucleus
and cytoplasm as you see in this figure question number number 19 which of the following is a characteristic of cancer cells option A they have a longer cell cycle option b they undergo apoptosis more frequently option C they can divide indefinitely option D they do not respond to growth factors the correct answer is they can divide indefinitely one of the Hallmarks of cancer cells is their ability to divide indefinitely without undergoing normal growth arrest or apoptosis this uncontrolled cell division is a result of genetic mutations that disrupt the cell cycle regulatory mechanisms question number 20
what is the main function of tilas option A to protect the ends of chromosomes from degradation option b to facilitate DNA replication option C to hold CST chromatids together option D to assist in protein synthesis the correct answer is to protect the ends of chromosomes from degradation dilas are repetitive DNA sequences located at the ends of chromosomes the major function is to protect the chromosomes from degradation and fusion ensuring the stability and integrity of the genetic material during cell division question number 21 in which phase of the cell cycle does the cell grow and carry
carry out normal functions options are a G1 phase B G S phase C G2 phase d m phase the correct answer is G1 phase G1 phase or cap one phase is when cell grows and carries out its normal functions it is a first phase of interface during which the cell increases in size synthesizes proteins and organal in preparation for DNA replication in the synthetic phase or S phase question number 22 what is the significance of the synaptonemal complex during meosis options are a it helps in the separation of sister chromatids B it facilitates the pairing
of homologous chromosomes C it assists in DNA replication D it forms the spindal apparatus the correct answer is it facilitates a pairing of homologous chromosomes it's a protein structure that forms between homologous chromosomes during prophase one of meiosis it helps align the homologues and facilitates the process of crossing over which increases genetic diversity in the resulting amids question number 23 how many times does a cell divide during meiosis options are a once B twice C3 times D4 times the correct answer is twice meosis involves two rounds of cell division meosis one and meosis 2 during
meosis one homologous chromosomes are separated while during meosis two sister chromatids are separated this results in the production of four genetically distinct hloy daughter cells from a single diploid parent cell question number 24 what is the main purpose of the anaas promoting complex or APC options are a to initiate DNA replication B to trigger the separation of sister chromatids C to repair damaged DNA D to align chromosomes at the metaphase plate the correct answer is to trigger the separation of sister chromatids the anaas promoting complex is a protein complex that triggers the separation of sister
chromatids during anaphase of mitosis and meosis it does this by making certain proteins for degradation allowing the cell to progress from metaphase to anaas question number 25 what happens during telofase options are a chromosomes condense B nuclear envelop reforms C chromosomes align at the metaphase plate D sister chromatids are pulled apart the correct answer is the nuclear envelope reforms during tase the nuclear envelope reforms around the separated chromosomes at each pole of the cell this marks the end of mitosis or meosis 2 and the beginning of cytosis the division of cytoplasm question number 26 what
is the primary function of the Kinto core options are a attach spindal fibers to chromosomes B to hold sister chromatids together C to facilitate DNA replication D to form the nuclear envelope the correct answer is to attach spindle fibers to chromosomes its primary function is to serve as an attachment site for the spindal fibers during cell division ensuring the proper segregation of chromosomes to the daughter cells question number 27 which of the following statements is true about homologous chromosomes options are a they are identical copies of each other B they carry the same genes but
may have different AL C they are produced during mitosis D they are always found in haid cells the correct answer is they carry the same genes but may have different alyss homologous chromosomes are pairs of chromosomes that carries the same genes but may have different alyss as you see here they are found in diploid cells and are separated during meiosis one to produce hloy gametes question number 28 what is the role of checkpoints in the cell cycle option A to ensure that the cell is ready to proceed to the next phase option b to promote
rapid cell division option C to repair damage DNA option D to facilitate protein synthesis the answer is to ensure that the cell is ready to proceed to the next phase cell cycle checkpoints check for proper DNA replication chromosome segregation and cell size before allowing the cell to progress to the next phase question number 29 during which phase of meiosis do homologous chromosomes separate option A prophase 1 option b metaphase 1 option C anaas 1 option D tofas 2 the correct answer is anaas one this reduction division ensures that each daughter cells receives one CR chromosome
from each homologous pair resulting in haid cells and the final question what is the consequence of Errors during meiosis option A increased genetic stability option b genetic disorders or aneuploidy option C enhanced DNA repair option D reduced cell division rates the correct answer is genetic disorders or anupy errors during meosis such as non-distinction or improper chromosome segregation that lead to genetic disorders or anlo which is a presence of an abnormal number of chromosomes in a Cell this can result in conditions like Town Syndrome Turnal syndromes Etc comment your score below take care stay bless thank
you so much you are with Biology exams for.com
