General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
21. Which of the following is milk sugar?
[A] Glucose
[B] Maltose
[C] Fructose
[D] Lactose
Show Answer
Correct Answer: D [Lactose]
Notes:
Lactose is known as milk sugar, and it is found in the milk of many mammals including humans and cows. Lactose is a disaccharide consisting of one unit of galactose and one unit of glucose.
22. What kind of virus is measles?
[A] enveloped RNA virus
[B] Coronaviridae
[C] tobacco mosaic virus
[D] Npne of these
Show Answer
Correct Answer: A [enveloped RNA virus]
Notes:
Measles is caused by a single-stranded, enveloped RNA virus with a serotype 1. It is classified as a member of the genus Morbillivirus in the Paramyxoviridae family. Humans are the only natural host of the measles virus.
23. 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.
24. Cycas, pinus, Thuja, Cedrus, Abies, Larix are some of the examples of __?
[A] gymnosperms
[B] Phaeophytes
[C] Bryophytes
[D] None of these
Show Answer
Correct Answer: A [gymnosperms]
Notes:
Cycas, pinus, Thuja, Cedrus, Abies, Larix are some of the examples of gymnosperms.
25. Which of the following is the smallest gymnosperm?
[A] Cycas
[B] Pinus
[C] Zamia
[D] Gnetum
Show Answer
Correct Answer: C [Zamia]
Notes:
The smallest gymnosperm is Zamia pygmia which reaches a height of 25 cm.
26. The cell wall of which of the following is made up of pectin and cellulose?
[A] Sclerenchyma
[B] Parenchyma
[C] Collenchyma
[D] All of the above
Show Answer
Correct Answer: C [Collenchyma]
Notes:
Collenchyma’s cell walls are made up of pectin and cellulose. They are stretched out, living cells with minute intercellular gaps.
27. 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.
28. What type of respiration occurs in all higher organisms?
[A] Aerobic Respiration
[B] Anaerobic Respiration
[C] Both 1 and 2
[D] Cheyne-Stokes respiration
Show Answer
Correct Answer: A [Aerobic Respiration]
Notes:
Aerobic respiration type of respiration occurs in all higher organisms like mammals.
29. Whip smut of sugarcane is caused by which of the following?
[A] Ustilago nuda
[B] Ustilago hordei
[C] Urocystis agrophri
[D] Ustilago sciteminae
Show Answer
Correct Answer: D [Ustilago sciteminae]
Notes:
Ustilago schitaminia causes a fungal disease in sugarcane called sugarcane whip smut. In this, the fungus usually grows within the meristem tissue.
30. On the basis of the number of embryonic layers, animals are classified into how many parts?
[A] Two
[B] Three
[C] Four
[D] Five
Show Answer
Correct Answer: A [Two]
Notes:
On the basis of the number of embryonic layers, animals are classified into Two – diploblastic and triploblastic animals.
