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Simulacro - Examen final de Biologia

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Simulacro del examen final de biologia. incluye biologia molecular, celular y genetica

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, SIMULACRO FINAL
Temas incluidos

✔ Biomoléculas​ ✔ Genética humana​
✔ Material genético​ ✔ Citoesqueleto​
✔ Replicación​ ✔ Mitosis / Meiosis​
✔ Transcripción​ ✔ Mitocondrias​
✔ Traducción​ ✔ Gametogénesi
✔ Código genético​



TEMA I – VERDADERO / FALSO
(Justifique solo las falsas)

1.​ ( ) La maltosa es un disacárido reductor formado por dos glucosas unidas por enlace α
(1→4).
2.​ ( ) Los esfingofosfolípidos poseen dos cadenas aciladas unidas al glicerol.
3.​ ( ) Todos los aminoácidos codificados por el ADN son del tipo L.
4.​ ( ) La estructura secundaria de las proteínas solo puede ser hélice alfa o lámina beta.
5.​ ( ) La ADN polimerasa solo puede iniciar síntesis si existe un extremo 3’-OH libre.
6.​ ( ) La ADN helicasa rompe los enlaces fosfodiéster para separar las hebras.
7.​ ( ) El ARNm eucariota recibe su caperuza 5’ mediante una reacción co-transcripcional.
8.​ ( ) Un anticodón del ARNt está orientado en dirección 3’→5’.
9.​ ( ) El codón UGA es un codón STOP en la mayoría de los organismos.
10.​( ) En la meiosis I se separan las cromátidas hermanas.
11.​( ) La quinesina avanza hacia el extremo + de los microtúbulos.
12.​( ) La mitocondria posee su propio ADN doble cadena circular.
13.​( ) La paquinema es el subperíodo donde se observa máximo entrecruzamiento.
14.​( ) En la ovogénesis solo una célula hija se convierte en gameto funcional.
15.​( ) La membrana interna de la mitocondria contiene porinas que permiten el paso libre
de solutos.​



TEMA II – SELECCIÓN MÚLTIPLE (una sola
correcta)
1) La sacarosa es un disacárido formado por:

a)​ glucosa + glucosa
b)​ glucosa + galactosa
c)​ glucosa + fructosa
d)​ fructosa + galactosa
e)​ glucosa + ribosa
2) El carbono anomérico de un monosacárido corresponde a:

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