1. Which among the following is correct statement about solubility of “Lipids”?
[A] They dissolve in water but are insoluble in organic solvents
[B] They do not dissolve in water but are soluble in organic solvents
[C] They dissolve in both water and organic solvents
[D] They do not dissolve in either water or organic solvents
Show Answer
Correct Answer: B [They do not dissolve in water but are soluble in organic solvents]
Notes:
Lipids are categorised within a group of naturally occurring molecules, including fats, waxes, sterols, fat-soluble vitamins and others. They are hydrophobic or non-polar, which explains why they’re not soluble in water, a polar substance, but are soluble in organic, non-polar solvents.
2. Non-vascular embryophytes are __:
[A] Pteridophytes
[B] Algae
[C] Bryophytes
[D] Gymnosperms
Show Answer
Correct Answer: C [Bryophytes]
Notes:
Bryophytes are an informal group consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. They play a vital role in regulating ecosystems because they provide an important buffer system for other plants.
3. What name has been given to the fear of crossing roads?
[A] Arthrophobia
[B] Atychiphobia
[C] Aichmophobia
[D] Agyrophobia
Show Answer
Correct Answer: D [Agyrophobia]
Notes:
The fear of crossing roads is called Agyrophobia. This phobia is considered to be independent from the fear of cars, as even crossing a deserted intersection still initiates the fear reaction.
4. The Trans-fats cause problems in human body because__:
[A] The fat molecules contain high energy that cause oxidation of the tissues
[B] The structure of the fat molecules is such that more molecules can fit in lesser space
[C] The fat molecules contain lesser energy and can not be used so easily
[D] None of the above reasons
Show Answer
Correct Answer: B [ The structure of the fat molecules is such that more molecules can fit in lesser space]
Notes:
Trans unsaturated fats are particularly risky because the double bond stereochemistry allows the fat molecules to assume a linear conformation, which leads to efficient packing (i.e., plaque formation).
5. In humans, fertilization normally occurs in __?
[A] Ovary
[B] Fallopian Tube
[C] Uterus
[D] Placenta
Show Answer
Correct Answer: B [ Fallopian Tube]
Notes:
In humans, fertilization normally occurs in the fallopian tube. The ovary is the female gonad that contains the eggs. The uterus is the organ that houses the developing embryo. The placenta is the structure that nourishes the embryo.
6. What is an another name for blood cancer?
[A] Leukemia
[B] Carcinoma
[C] Sarcoma
[D] Melanoma
Show Answer
Correct Answer: A [Leukemia]
Notes:
Leukemia, a type of cancer found in your blood and bone marrow. It is caused by the rapid production of abnormal white blood cells. The high number of abnormal white blood cells are not able to fight infection, and they impair the ability of the bone marrow to produce red blood cells and platelets.
7. Which among the following carries impure blood to human heart?
[A] Pulmonary vein
[B] Vena Cava
[C] Aorta
[D] Pulmonary arteries
Show Answer
Correct Answer: D [Pulmonary arteries]
Notes:
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
8. RBCs are formed in which of the following in the adults?
[A] black bone marrow
[B] white bone marrow
[C] red bone marrow
[D] blue bone marrow
Show Answer
Correct Answer: C [red bone marrow]
Notes:
There are two types of bone marrow: red marrow (also known as myeloid tissue) and yellow marrow. Red blood cells, platelets and most white blood cells arise in red marrow; some white blood cells develop in yellow marrow.
9. The sequencing of the entire genome (the totality of all genes) of an organism was completed in 1996. Which one of the following was that organism? (UPSC Prelims 1997)
[A] Albino mouse
[B] yeast
[C] human being
[D] Plasmodium vivax
Show Answer
Correct Answer: D [Plasmodium vivax]
Notes:
Plasmodium vivax is a protozoal parasite and a human pathogen. This parasite is the most frequent and widely distributed cause of recurring malaria.
10. What does the stones formed in human kidney consist of? (UPSC Prelims 2000)
[A] calcium oxalate
[B] sodium acetate
[C] magnesium sulphate
[D] calcium
Show Answer
Correct Answer: A [calcium oxalate]
Notes:
Stones are typically classified by their location: nephrolithiasis (in the kidney), ureterolithiasis (in the ureter), cystolithiasis (in the bladder), or by what they are made of (calcium oxalate, uric acid, struvite, cystine).
