FREE MCAT AND STUDY GAMES ABOUT BIOLOGY TERMS -

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FREE MCAT AND STUDY GAMES ABOUT BIOLOGY TERMS -

MCAT EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -46 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Disjunction

Answer:

separation of homologous chromosomes by chance to daughter cells

Question 2: Genetic recombination

Answer:

result of crossing over; exchange of genetic data

Question 3: Binary fission

Answer:

simple form of asexual reproduction in prokaryotes

Question 4: Chiasmata

Answer:

points where crossing over occurs

Question 5: Blastopore

Answer:

opening of the archenteron

Question 6: Induction

Answer:

the differentiation of a group of cells by another group (the organizers)

Question 7: Gastrula

Answer:

three-layered structure: ectoderm, endoderm, and archenteron

Question 8: Umbilical vein

Answer:

carries oxygenated blood from the placenta to the fetus

Question 9: Blastula

Answer:

hollow sphere of cells

Question 10: Kinetochores

Answer:

connection point of spindle fiber to centromere on chromosome

Question 11: Chorion

Answer:

a membrane that completely surrounds the amnion and extends chorionic villi

Question 12: Archenteron

Answer:

newly formed cavity of the two-layered gastrula; develops into the gut

Question 13: Deuterostomes

Answer:

organisms for which blastopore develops into the anus

Question 14: Budding

Answer:

replication of nucleus with unequal cytokenesis; in yeast and hydra

Question 15: Notochord

Answer:

rod of mesodermal cells; induces the formation of the neural groove/tube

Question 16: Chromatin

Answer:

uncoiled DNA which appears granular

Question 17: Fetal Hemoglobin

Answer:

Hb-F; greater affiliation for oxygen than maternal hemoglobin

Question 18: Blastocyst

Answer:

the mammalian blastula

Question 19: Ductus arteriosus

Answer:

a shunt connecting the pulmonary artery to the aorta

Question 20: Umbilical chord

Answer:

connection between fetus and placenta; develops from the allantois and yolk sac

Question 21: Cleavage

Answer:

embryonic development through a series of rapid mitotic divisions

Question 22: Blastulation

Answer:

process of the morula developing a fluid-filled cavity called, a blastocoel

Question 23: Protostomes

Answer:

organisms for which blastopore develops into the mouth

Question 24: Determinate cleavage

Answer:

results in a cell whose future pathways are determined early

Question 25: Inducers

Answer:

chemical substances passed by organizers during induction

Question 26: Endometrium

Answer:

mucosal lining of the uterus; prepared by progesterone; location of implantation

Question 27: Foramen ovale

Answer:

a shunt that delivers blood from the RA to the LA bypassing the pulmonary circuit

Question 28: Synapsis

Answer:

process of chromosome pair overlapping