Which one of the following is NOT a component of human male reproductive system ?
- A.Cervix
- B.Urethra
- C.Seminal vesicle
- D.Vas deferens
Correct answer
Explanation
The correct answer is A, Cervix. The cervix is the narrow lower neck of the uterus and belongs to the female reproductive system.
In the male, sperms are made in the testes, which lie in the scrotum outside the body because sperm formation needs a temperature a little lower than body temperature. The sperms are stored in the epididymis and carried by the vas deferens towards the urethra. On the way, the seminal vesicles and the prostate gland add fluid that nourishes the sperms and makes them easier to transport, and the mixture is called semen. The urethra, which runs through the penis, carries both urine and semen out of the body. In the female, the cervix opens into the vagina.
B is wrong because the urethra is the common passage for urine and semen in males. C is wrong because the seminal vesicles are male glands that add fluid to semen. D is wrong because the vas deferens is the male tube that carries sperms from the epididymis.
Exam tip: Testis, epididymis, vas deferens, seminal vesicle, prostate, urethra are male; cervix, uterus, ovary are female.
Practice Questions
View allThe fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
- A.Galileo
- B.Martin Luther
- C.Johannes Kepler
- D.Copernicus
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In 1609 Kepler showed that the planets move around the Sun in elliptical orbits, with the Sun at one focus of the ellipse.
Read the full explanation →Which one of the following statements is correct?
- A.Urea is produced in liver.
- B.Urea is produced in blood.
- C.Urea is produced from digestion of starch.
- D.Urea is produced in lung and kidney.
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Liver cells turn the toxic ammonia released from the breakdown of amino acids into urea through the ornithine cycle, also called the urea cycle.
Read the full explanation →Which one of the following is the correct sequence of passage of light in a compound microscope?
- A.Condenser-Objective lens-Eyepiece-Body tube
- B.Objective lens-Condenser-Body tube-Eyepiece
- C.Condenser-Objective lens-Body tube-Eyepiece
- D.Eyepiece-Objective lens-Body tube-Mirror
Show answer
Light passes through the condenser to the specimen, is picked up by the objective lens, travels up the body tube and reaches the eye through the eyepiece.
Read the full explanation →Which one of the following statements regarding haemoglobin is correct?
- A.Haemoglobin present in RBC can carry only oxygen but not carbon dioxide.
- B.Haemoglobin of RBC can carry both oxygen and carbon dioxide.
- C.Haemoglobin of RBC can carry only carbon dioxide.
- D.Haemoglobin is only used for blood clotting and not for carrying gases.
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It binds oxygen at its iron-containing haem groups and carries some carbon dioxide on its protein chains. Each haemoglobin molecule has four polypeptide chains and four haem groups, and each haem iron can hold one oxygen molecule, forming oxyhaemoglobin in the lungs.
Read the full explanation →Which one of the following statements regarding histone proteins is correct?
- A.Histones are proteins that are present in mitochondrial membrane.
- B.Histones are proteins that are present in nucleus in association with DNA.
- C.Histones are proteins associated with lipids in the cytosol.
- D.Histones are proteins associated with carbohydrates in the cytosol.
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They are the proteins around which DNA winds to form chromatin in the nucleus of eukaryotic cells. Histones are small basic proteins, rich in the positively charged amino acids lysine and arginine, which attract the negatively charged phosphate groups of DNA.
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