FREE MCAT AND STUDY GAMES ABOUT MCAT BIO. CH. 2

PDF Download

FREE MCAT AND STUDY GAMES ABOUT MCAT BIO. CH. 2

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -68 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: X Chromosome:

Answer:

Carries a sizeable amount of genetic information. Mutations of which can cause sex-linked disorders.

Question 2: M Stage (Mitosis)

Answer:

Mitosis and cytokinesis occur Question 3: An Egg Is Ovulated Into The:

Answer:

Peritoneal sac and is drawn into the fallopian tube or oviduct.Question 4: Fallopian Tubes Are Connected To The:

Answer:

Uterus, the lower end of which is called the cervix.

Question 5: After Meiosis II, The Germ Cells Are called:

Answer:

Spermatids

Question 6: Meiosis II

Answer:

Sister chromatids are separated from each other that is functionally identical to mitosis.Question 7: Restriction Point In G1 Stage:

Answer:

DNA is checked for quality and must be passed for the cell to move into the S stage.Question 8: Diploid (2n) Cells Have:

Answer:

Two copies of each chromosome

Question 9: Zona Pullcida

Answer:

Surrounds oocytes, its an acellular mix of glycoproteins that protect the oocyte and contain the compounds necessary for sperm binding

Question 10: Prophase I (Meiosis I)

Answer:

Same events as prophase of mitosis, EXCEPT that homologues come together and intertwine in a process called synapsis Question 11: Ovulated Egg Each Month Which Is Arrested In Metaphase II:

Answer:

Secondary OOcyte Question 12: Women With One Copy Of The Affected Allele Are Called:

Answer:

Carriers

Question 13: Gonadotropin-releasing Hormone (GnRH) From Hypothalamus:

Answer:

Causes the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), the functions of which depend on the sex of the individual Question 14: Menstruation Occurs If:

Answer:

There is no fertilization.

Question 15: Acrosome Of A Sperm Cell

Answer:

Contains the genetic material, and is a modified Golgi apparatus that contains enzymes to help the sperm fuse to and penetrate the ovum.

Question 16: Testosterone

Answer:

Responsible for the maintenance and development of the male reproductive system and male secondary sex characteristics Question 17: S Stage (Synthesis):

Answer:

DNA is replicated. The strands of DNA called chromatids are held together at the centromere.Question 18: G1, S, G2 Stages Are Called:

Answer:

Interphase, during which DNA is uncoiled in the form of chromatin Question 19: Menopause Occurs When:

Answer:

The ovaries stop producing estrogen and progesterone between ages 45 and 55.

Question 20: Sex Chromosome # =

Answer:

23rd pair. XX = female, XY = male

Question 21: Telophase (Mitosis)

Answer:

Nuclear membrane reforms, spindle apparatus disappears, and cytosol and organelles are split between the two daughter cells through cytokinesis.

Question 22: Homologues

Answer:

Chromosomes that are given the same number but are of opp. parental origin Question 23: Follicular Phase Of Menstrual Cycle:

Answer:

GnRH secretion stimulates FSH and LH secretion, which promotes follicle development Question 24: Midpiece Of A Sperm Cell:

Answer:

Generates ATP from fructose and contains many mitochondria

Question 25: Luteal Phase Of Menstual Cycle

Answer:

LH promotes the ruptured follicle to become the corpus luteum which secretes progesterone that maintains the uterine lining.Question 26: Oogenesis:

Answer:

One haploid ovum and a number of polar bodies are formed from an oogonium Question 27: Sister Chromatids Are:

Answer:

Copies of the same DNA held together at the centromere

Question 28: Prophase (Mitosis)

Answer:

Chromosomes condense, nuclear membrane dissolves, nucleoli disappear, centrioles migrate to opp.sides of the cell, and the spindle apparatus begins to form