Examen De Ciclo Celular Mitosis Y Meiosis
ESTE EXAMEN PRESENTA 12 PREGUNTAS DE OPCION MULTIPLE Y LLENADO DE ESPACIOS. EL EXAMEN ESTA DISEÑADO PARA SER CONTESTADO EN 20 MINUTOS, SI SE PASA DE DICHO TIEMPO EL EXAMEN SE ANULARA AUTOMATICAMENTE, AL FINAL DEL EXAMEN DEBERAS ENVIAR POR CORREO UNA CAPTURA DE PANTALLA DE TU CERTIFICADO DE CALIFICACION CON TU NOMBRE A LA SIGUIENTE DIRECCION [email protected]
Questions and Answers
- 1.
Al final de la mitosis se producen 2 células haploides
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
At the end of mitosis, two diploid cells are produced, not haploid cells. Mitosis is the process of cell division where a single cell divides into two identical daughter cells, each containing the same number of chromosomes as the parent cell. Therefore, the correct answer is false.Rate this question:
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- 2.
La meiosis solo se da en células germinales
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Meiosis is a type of cell division that occurs only in the specialized cells called germ cells. Germ cells are the cells involved in sexual reproduction and are found in the reproductive organs such as the ovaries and testes. During meiosis, the number of chromosomes in the cell is halved, resulting in the formation of gametes (sperm and eggs) with half the number of chromosomes as the parent cell. Therefore, the statement that meiosis only occurs in germ cells is correct.Rate this question:
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- 3.
EN ESTA FASE DE LA MITOSIS LOS CROMOSOMAS SE ALINEAN PARA POSTERIORMENTE IR A CADA UNO DE LOS POLOS DE LA CELULA
- A.
PROFASE
- B.
METAFASE
- C.
ANAFASE
- D.
TELOFASE
- E.
CITOCINESIS
Correct Answer
B. METAFASEExplanation
During metaphase, the chromosomes align themselves along the equatorial plane of the cell. This alignment is crucial for the accurate distribution of chromosomes to each daughter cell during cell division. The spindle fibers attach to the centromeres of each chromosome, ensuring their proper positioning. Once the chromosomes are aligned, they are ready to separate and move towards opposite poles of the cell during anaphase.Rate this question:
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- 4.
ES EL ROMPIMIENTO CRITICO DE LA MEMBRANA PLASMATICA EN LA FORMACION DE LAS 2 CELULAS HIJAS
Correct Answer
CITOCINESISExplanation
The given correct answer, CITOCINESIS, refers to the process of cell division where the cytoplasm of a cell divides, resulting in the formation of two daughter cells. During this process, the plasma membrane undergoes a critical breaking point, leading to the separation of the two daughter cells. Therefore, CITOCINESIS accurately describes the critical breaking of the plasma membrane in the formation of the two daughter cells.Rate this question:
- 5.
EN QUE FASE DEL CICLO CELULAR SE LLEVA A CABO EL SEGUNDO PUNTO DE VERIFICACION
- A.
EN G1
- B.
AL FINAL DE S
- C.
AL INICIO DE G2
- D.
AL FINAL DE G2
- E.
AL INICIO DE M
Correct Answer
D. AL FINAL DE G2Explanation
The second checkpoint in the cell cycle occurs at the end of G2 phase. This checkpoint is responsible for ensuring that all DNA has been replicated correctly and any damage or errors have been repaired before the cell enters the mitotic phase (M phase). It is an important control mechanism to prevent the transmission of damaged or mutated DNA to daughter cells.Rate this question:
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- 6.
QUE PROTEINA ESTA ENCARGADA DE LA REGULACION DEL CICLO CELULAR
- A.
CITOCROMO C
- B.
CINASA
- C.
CITOCINA
- D.
SINTASA
Correct Answer
B. CINASAExplanation
La cinasa es una enzima que juega un papel crucial en la regulación del ciclo celular. Esta proteína es responsable de la fosforilación de otras proteínas, lo que a su vez desencadena una serie de eventos que controlan el progreso del ciclo celular. La cinasa actúa como un interruptor que activa o desactiva diferentes procesos celulares, asegurando que el ciclo celular se lleve a cabo correctamente. Por lo tanto, la cinasa es la proteína encargada de la regulación del ciclo celular.Rate this question:
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- 7.
LA RESPIRACION Y LA DETERMINACION DE LAMUERTE CELULAR ESTA DETERMINADA POR LA
- A.
MEMBRANA NUCLEAR
- B.
MEMBRANA PLASMATICA
- C.
MITOCONDRIA
- D.
MATRIZ EXTRACELULAR
Correct Answer
C. MITOCONDRIAExplanation
The correct answer is mitochondria. Mitochondria are responsible for cellular respiration, the process by which cells convert glucose into ATP, the energy currency of the cell. They are also involved in apoptosis, the programmed cell death that occurs in response to various stimuli. Therefore, the respiratory and cell death processes in cells are determined by the mitochondria.Rate this question:
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- 8.
FASE EN LA CUAL SE LLEVA A CABO LA REPLICACION DEL ADN
Correct Answer
SExplanation
COLOCAR SOLO LA LETRA DE LA FASERate this question:
- 9.
CUANTOS CROMOSOMAS HAS Y EN UNA CELULA DESPUES DE LA MEIOSIS, SI LA CELULA MADRE TIENE UNA DIPLOIDIA DE 40
- A.
20
- B.
23
- C.
60
- D.
80
Correct Answer
A. 20Explanation
During meiosis, the cell undergoes two rounds of division, resulting in the formation of four haploid cells. Haploid cells contain half the number of chromosomes as the original diploid cell. In this case, the cell mother has a diploidy of 40, so after meiosis, each haploid cell will have 20 chromosomes. Therefore, the correct answer is 20.Rate this question:
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- 10.
LA RECOMBINACION HOMOLOGA ES CARACTERISTICA DE LA MITOSIS
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement "LA RECOMBINACION HOMOLOGA ES CARACTERISTICA DE LA MITOSIS" translates to "Homologous recombination is characteristic of mitosis." However, this statement is incorrect. Homologous recombination is a process that occurs during meiosis, not mitosis. In mitosis, the genetic material is replicated and divided equally between two daughter cells, while in meiosis, homologous chromosomes exchange genetic material through recombination. Therefore, the correct answer is false.Rate this question:
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- 11.
SON EJEMPLO DE CELULAS SOMATICAS EXCEPTO
- A.
ESPERMATOZIODE
- B.
HEPATOCITO
- C.
CARDIOMIOCITO
- D.
CELULA BETA
Correct Answer
A. ESPERMATOZIODEExplanation
The correct answer is ESPERMATOZIODE. Spermatozoids are not somatic cells as they are reproductive cells involved in sexual reproduction. Somatic cells are all the other cells in the body that are not involved in reproduction, such as hepatocytes (liver cells), cardiomyocytes (heart muscle cells), and beta cells (pancreatic cells).Rate this question:
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- 12.
QUE EFECTO TIENE EL ENTRECRUZAMIENTO MEIOTICO
- A.
PERPETUACION DE LA INFORMACION GENETICA
- B.
AUMENTO CROMOSIMICO DE LAS ESPECIES
- C.
VARIABILIDAD GENETICA DE LAS ESPECIES
- D.
INDEPENDENCIA DE LOS CARACTERES PATERNOS Y MATERNOS
Correct Answer
C. VARIABILIDAD GENETICA DE LAS ESPECIESExplanation
El entrecruzamiento meiótico es un proceso fundamental en la reproducción sexual que ocurre durante la formación de los gametos. Durante este proceso, los cromosomas homólogos intercambian segmentos de ADN, lo que resulta en una redistribución de la información genética. Este intercambio aleatorio de material genético entre los cromosomas homólogos genera variabilidad genética en las especies. Esta variabilidad es importante porque permite la adaptación y evolución de las especies, ya que proporciona diferentes combinaciones de genes que pueden conferir ventajas adaptativas en diferentes entornos. Por lo tanto, la respuesta correcta es "variabilidad genética de las especies".Rate this question:
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