Biology - Online Test
Q1. Brunner’s gland is
Answer : Option B
Explaination / Solution:
Brunner’s glands are submucosal mucin secreting glands localized predominantly in the duodenal bulb and proximal duodenum, decreasing progressively in size and number in the distal portions.
Sub-mucosal glands (Brunner’s glands) provide alkaline medium.
Q2. Alzheimer disease in humans is associated with the deficiency of
Answer : Option D
Explaination / Solution:
Alzheimer disease is a neurological disorder in which the death of brain cells causes memory loss and cognitive decline. It is caused in human due to deficiency of acetylcholine.
Q3. Hypothalamus helps to maintain homeostasis by controlling hunger, thirst, blood pressure, temperature feelings etc. So it is an important link between
Answer : Option D
Explaination / Solution:
One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis). The hypothalamus is located below the thalamus and is part of the limbic system
Q4. Laminaria and Fucus belong to
Answer : Option B
Explaination / Solution:
The common forms of Brown algae or Phaeophyceae are Ectocarpus, Dictyota, Laminaria, Sargassum and Fucus.2
Q5. Select the incorrect matching
Answer : Option C
Explaination / Solution:
Mitochondria contain cristae, finger like projection of inner layer, thylakoid is present in chloroplast and lysosome is a digestive enzyme but RNA is absent in Chromosome.
Q6. There is no DNA in
Answer : Option D
Explaination / Solution:
Because of the lack of nuclei and organelles, mature red blood cells do not contain DNA and cannot synthesize any RNA, and consequently cannot divide and have limited repair capabilities. The inability to carry out protein synthesis means that no virus can evolve to target mammalian red blood cells.
Q7. Which of the following can be categorised as a photoautotroph ?
Answer : Option D
Explaination / Solution:
Photoautotrophs are organism that perform photosynthesis in presence of sunlight. Euglena contains chlorophyll and fixes the solar energy so, it acts as photoautotrophs.
Q8. Photosynthesis take place in
Answer : Option C
Explaination / Solution:
Photosynthesis takes place only in the green parts of the plants, mainly the leaves.
Q9. Pharynx is the common passage for food and air but still food do not enter into the windpipe due to the presence of
Answer : Option A
Explaination / Solution:
The epiglottis is a leaf-shaped flap of cartilage located behind the tongue, at the top of the larynx, or voice box. The main function of the epiglottis is to seal off the windpipe during eating, so that food is not accidentally inhaled.
Q10. Taichung Native-1”, a rice variety was introduced in India from
Answer : Option D
Explaination / Solution:
Taichung Native-1 is a rice variety introduced in India from Taiwan. This variety of rice is medium sized having long inflorescence. The maturity period is also shorter than usual varieties of rice.
