11. A person with ‘AB’ blood group is sometimes called a universal recipient because of the? (UPSC Prelims 1995)
[A] lack of antigen in his blood
[B] lack of antibodies in his blood
[C] lack of both antigens and antibodies in his blood
[D] presence of antibodies in his blood
Show Answer
Correct Answer: B [lack of antibodies in his blood]
Notes:
Type AB is considered the universal recipient, as they have both A and B antigens on their red blood cells, and thus their body does not have antibodies against A or B antigen cells, so they can receive blood from any blood type.
12. Biometric is related to which of the following statement?
[A] the process of ageing, and the particular problems of old people
[B] heredity and variation
[C] body measurements and calculations related to human characteristics
[D] transmission of paternal traits to progeny
Show Answer
Correct Answer: C [body measurements and calculations related to human characteristics]
Notes:
Biometrics are calculations related to body measurements and human characteristics. Biometric authentication is used in computer science as a form of identification and access control.
13. Which of the following branch of biology deals with the study of pollen grains?
[A] Psychology
[B] Palynology
[C] Pathology
[D] Parasitology
Show Answer
Correct Answer: B [Palynology]
Notes:
Palynology is the study of pollen grains produced by seed plants and spores. It represents the land flora and can be used in many different disciplines.
14. Cell theory was formulated by __?
[A] Charles Darwin
[B] Theodor Schwann
[C] Robert Hooke
[D] Robert Koch
Show Answer
Correct Answer: B [Theodor Schwann]
Notes:
The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. In the first part explains that all organisms are made up of cells. The second part explains that cells are the basic units of life. The third part, explains that cells come from preexisting cells that have multiplied. It was described by Rudolf Virchow in 1858.
15. Which cell organelle controls the entry and exit of molecules into and out of the cell?
[A] Golgi bodies
[B] Cell membrane
[C] Lysosomes
[D] Mitochondria
Show Answer
Correct Answer: B [Cell membrane]
Notes:
A plasma membrane is made up of lipids and proteins. The composition can fluctuate depending on the fluidity in the plasma membrane, the external environment, and the different stages of cell development.
16. Chromatophores participate in which of the following processes?
[A] Photosynthesis
[B] respiration
[C] Development
[D] Speed
Show Answer
Correct Answer: A [Photosynthesis]
Notes:
Chromatophores are one of the members of phototrophic bacteria. They contain bacteriochlorophyll pigments and carotenoids and participate in photosynthesis.
17. Which of the following is an example of epiphilous stamen?
[A] Lily
[B] Hibiscus
[C] Pea
[D] Bombax
Show Answer
Correct Answer: A [Lily]
Notes:
Lily is an example of an epiphyllous stamen. Hibiscus is an example of a Monadelphous. Pea is an example of a Diadelphous. Bombax is an example of a Polyadelphous.
18. Which is the type of photosynthesis reaction?
[A] Oxidation-Reduction reaction
[B] Synthesis reaction
[C] Organic reaction
[D] Replacement reaction
Show Answer
Correct Answer: A [Oxidation-Reduction reaction]
Notes:
In the process of photosynthesis, which is done by chlorophyll, plants prepare food, intake carbon dioxide, and release oxygen. Photosynthesis is considered an Oxidation-Reduction reaction.
19. An important product of the Krebs cycle is__?
[A] Water
[B] Methane
[C] ATP
[D] None of the above
Show Answer
Correct Answer: C [ATP]
Notes:
An important product of the Krebs cycle is ATP. Adenosine triphosphate (ATP) is a source of energy for use and storage at the cellular level.
20. In the absence of which of the following will photosynthesis not occur in leaves?
[A] Chlorophyll
[B] Guard cells
[C] Space between cells
[D] Vacuole
Show Answer
Correct Answer: A [Chlorophyll]
Notes:
In the absence of chlorophyll, photosynthesis does not occur in leaves. The chlorophyll in leaves helps capture the energy of sunlight. Chlorophyll is a green pigment found in plants.
