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عدد الخيارات في هذه العجلة: 50

• Which part of the female reproductive system is responsible for the production of estrogen and progesterone? A. cervix C. oviducts B. ovaries D. uterus
• Which part of the male reproductive system serves as storage and maturation site of sperms? A. bulbourethral glands C. epididymis B. prostate gland D. vas deferens
• Where does fertilization of egg take place? A. cervix C. oviduct B. ovaries D. uterus
• What happens to the corpus luteum if pregnancy does not occur? A. It develops into a new secondary oocyte. B. It continues to secrete progesterone and estrogen. C. It degenerates. D. It thickens in the uterus.
• Which of the following is the correct order of the menstrual cycle? A. menstruation, follicular phase, ovulation, luteal phase B. follicular phase, luteal phase, ovulation, menstruation C. follicular phase, ovulation, luteal phase, menstruation D. luteal phase, ovulation, follicular phase, menstruation
• The menstrual cycle is initiated by which of the following hormones? A. estrogen C. FSH B. LH D. progesterone
• . When does ovulation occur? A. a day before menstruation B. no definite time C. immediately after menstruation D. a day after a sharp increase in the LH
• Which stage in the menstrual cycle are progesterone and more estrogen secreted? A. follicular phase C. luteal phase B. ovulation D. menstruation
• The following are characteristics of progesterone EXCEPT: A. Produced by the follicle B. Helps thicken uterine lining. C. Maintains endometrium lining. D. Secretes after ovulation
• Which of the following is NOT a structure of the human reproductive system? A. ureter B. vas deferens C. ovary D. testes
• Hormones play an important role in both male and female reproductive systems. What particular gland controls the functions of both the testes and ovaries? A. Pancreas C. Adrenal gland B. Pituitary gland D. Hypothalamus gland
• The ovary releases a hormone called estrogen which causes a profound effect to the uterus. What effect does it have on the uterus? A. It thickens the uterine lining for the implantation of the fertilized egg. B. It thickens the uterine lining for the secretion of prostaglandins. C. It thickens the uterine lining in preparation for menstruation. D. It thickens the uterine lining resulting in the inflammation of endometrium.
• The production of sperm cells and release of semen can be regulated by hormones that come from the brain, pituitary gland, and the testis. This statement is_____. A. False C. True B. neither A nor B D. cannot be determined
• How does the production of progesterone help during the menstrual cycle and pregnancy? A. It controls the development of endometrium and maintenance of the uterus. B. It stimulates the production of milk in the mammary glands. C. It stimulates ovulation and maturation of egg. D. It stimulates the maturation of egg cell in the ovary and estrogen production.
• Progesterone is secreted by ____________. A. Ovarian Follicle C. Maturing Follicle B. Corpus Luteum D. Corpus Follicle
• Ovulation occurs between which day(s)? A. Seventh to 13th C. 13th to 15th B. 10th to 12th D. 23rd to 27th
• The uterine lining is thicker on which day(s)? A. Day 1 C. Day 14 B. Day 8 D. Day 24
• Which hormone STARTS the ovulation cycle? A. Progesterone C. Estrogen B. Luteinizing hormone D. FSH
• Which phase is progesterone released? A. Menstruation C. Ovulation B. Follicular D. Luteal
• . In which phase does follicle starts to mature? A. Menstruation C. Ovulation B. Follicular D. Luteal Phase
• The endocrine system works together with the ________ system to maintain homeostasis of the body. A. digestive C. respiratory B. nervous D. reproductive
• An endocrine gland decreases its secretory action in response to an increased concentration of the hormones it regulates. This is an example of __________. A. Positive feedback system B. Lock and key system C. Negative feedback system D. Signaling system
• When the labor starts, nerve cells in the uterus signal the hypothalamus to release oxytocin hormone into the bloodstream which causes the uterus to contract. This is an example of what type of feedback mechanism. A. Positive feedback C. Negative Feedback B. Both A and B D. None of these
• The following are examples of the coordinated functions of the nervous, endocrine, reproductive system EXCEPT: A. Breastfeeding C. Pregnancy B. Menstrual cycle D. Ligation
• What might happen to a person whose nervous and endocrine systems fail to maintain homeostasis? A. Failure to maintain homeostasis a person will become sickly and eventually die. B. Failure to maintain homeostasis a person will become healthy in mind and body. C. Failure to maintain homeostasis a person will become happy in life. D. All of the above
• Which of the following serves as the template for the assembly of amino acids during protein synthesis? A. DNA C. mRNA B. rRNA D. tRNA
• What nitrogenous base is found in RNA but not in DNA? A. Thymine C. Adenine B. Guanine D. uracil
• What is the role of tRNA in protein synthesis? A. To bring the amino acid in the cytoplasm to the ribosome to make proteins. B. To carry the information to the ribosome found in the cytoplasm. C. To direct the order of nucleotides in mRNA. D. To hold the nucleotides together in a DNA pair.
• The process of making protein is called _________________. A. duplication C. protein synthesis B. translation D. transcription
• Where does protein synthesis takes place? A. In the ribosomes of eukaryotic cells. B. In the cell wall of prokaryotes C. In the mitochondrion of eukaryotes D. None of the above
• Through the processes of ____ and ____ information from DNA and RNA are used to make proteins. A. transcription and subscription B. transcription and translation C. translation and duplication D. replication and subscription
• Each set of three nitrogen bases that represents an amino acid is a (n) _____________. A. codon C. enzyme B. helix D. code
• Which of the following is NOT involved in translation? A. mRNA B. tRNA C. ribosome D. DNA
• Which of the following base pairs would never be found in the cell? A. A-T B. C-G C. T-U D. A-U
• The following is the base sequence on one strand of a DNA molecule: TTT GCC AGT AAT
• . If transcribed into a mRNA, what would be the resulting strand? A. AAA CGG TCA TTA C. AAA CGG UCA UUA B. AGC AGG AGA TC D. UUU CGG UCA UUA
• During translation, the tRNA sequence of nucleotides arranged linearly is ___________. A. TCG TCC GTC TAG C. AGC AGG CAG AUC B. UUU GCC AGU AAU D. AAA GCC AGU AAU
• What is the correct sequence of amino acid? A. Asp-Ala-Ser-Gly C. Lys-Arg-Ser-Leu B. Phe-Ala-Ser-Lys D. Phe-Ala-Ser-Asp
• What type of mutation results in the breakage and loss of chromosomes? A. Duplication C. Translocation B. Inversion D. Deletion
• Why in a base substitution mutation, a gene sometimes has no effect on the protein which the genes code for? A. a correcting mechanism of the mRNA B. a recessive mutant gene C. some amino acids have more than one codon D. the presence of a stop codon
• When portions of chromosomes are present in multiple copies, this chromosomal aberration is called ___________. A. Deletion C. Duplication B. Inversion D. Translocation
• Sickle-cell anemia, which involves a change in one of the polypeptides in the hemoglobin molecule, is due to what type of point mutation? A. nonsense mutation C. silent mutation B. missense mutation D. none of the above
• Cri du chat is a genetic abnormality due to the loss of a segment of which chromosome number? A. 3 C. 5 B. 4 D. 21
• Down syndrome is a condition results in the duplication of which chromosome number? A. 13 C. 18 B. 15 D. 21
• Mutations can happen in portions of DNA or in the structures of chromosomes. When a piece of chromosome breaks off and attaches to another chromosome, this is known as _______. A. Translocation C. Deletion B. Duplication D. Inversion
• The following pairs of animals are examples of analogous structures EXCEPT: A. Wings of bat and butterfly B. Whale’s flipper and wings of penguin C. Human arm and cat’s forelimb D. Wings of bird and moth
• Which pairs of animals show a correct example of analogous structures? A. Human arm and flipper of whale B. Wings of bat and butterfly C. Human hand and forelimb of alligator D. Forelimb of cat and turtle
• Which of the following statements DOES NOT describe evolution? A. Evolution is continuous. B. Evolution refers to change. C. The world is stable and unchanging. D. If there is mutation, there is evolution.
• According to evolutionists, which is the best test to show the relatedness of two organisms? A. Similarity in development B. Similarity in courting behavior C. Similarity in structure D. Similarity in genomic DNA
• Study the following data to answer the questions. Primate Percentage of Amino acid Difference from Humans Orangutan 3.7 Chimpanzee 1.8 Gibbon 5.2 Gorilla 2.1 Which primate is most closely related to humans? A. Orangutan C. Chimpanzee B. Gibbon D. Gorilla