Daily Biology Questions for NEET 2022
Q. ID – 08012021
Which of the following is not a feature of genetic code ?
- The codon is triplet.
- One codon codes for many amino acid, hence the code is degenerate.
- The codon is read in mRNA in a contiguous fashion. There are no punctuations.
- The code is nearly universal.
Answer : 2nd option
Explanation :
→ The codon is triplet. 61 codons code for amino acids and 3 codons do not code for any amino acids, hence they function as stop codons.
→ Some amino acids are coded by more than one codon, hence the code is degenerate.
→ The codon is read in mRNA in a contiguous fashion. There are no punctuations.
→ The code is nearly universal: for example, from bacteria to human UUU would code for Phenylalanine (phe). Some exceptions to this rule have been found in mitochondrial codons, and in some protozoans.
☆ NCERT 12, Page 112
Q. ID – 07012021
Which of the following algae produce non-motile spores :
- Cyanophyceae
- Chlorophyceae
- Phaeophyceae
- Rhodophyceae
Answer : 4th option
Explanation :
→ Cyanophyceae are algal-like photosynthetic bacteria (Blue-green algae), not truly algae.
→ Chlorophyceae (Green algae) produce flagellated zoospore which are motile.
→ Phaeophyceae (Brown algae) produce biflagellate zoospore which are also motile.
→ But flagella is completely absent in Rhodophyceae (Red algae). So they produce non-motile spores.
☆ NCERT 11, Page 33 (Table : 3.1)
Q. ID – 06012021
A few organisms can tolerate and thrive in a wide range of temperatures, they are called:
- Stenothermal
- Eurythermal
- Stenohaline
- Euryhaline
Answer : 2nd option
Explanation :
→ A vast majority of organisms can tolerate a narrow range of temperatures. Such organisms are called Stenothermal.
→ A few organisms can tolerate and thrive in a wide range of temperatures, they are called eurythermal.
→ Many organisms are restricted to a narrow range of salinities are considered as Stenohaline.
→ Some organisms are tolerant of a wide range of salinities are termed as Euryhaline.
☆ NCERT 12, Page 222
Q. ID – 05012021
The practice of mating of animals within the same breed, but having no common ancestors up to 4-6 generations is called :
- In-breeding
- Out-breeding
- Out-crossing
- Cross-breeding
Answer : 3rd option
Explanation :
In-breeding → breeding is between animals of the same breed.
Out-breeding → breeding of the unrelated animals.
Out-crossing → mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4-6 generations.
Cross-breeding → mating of animals between the desirable qualities of two different breeds.
☆ NCERT 12, Page 168
Q. ID – 04012021
Which of the following is the correct statement about digestive gland ?
- Liver is the largest endocrine gland of the body.
- The hepatic cells are the structural and functional units of the liver.
- Each lobule of liver is covered by a thin connective tissue called the Glisson’s capsule.
- The common hepato-pancreatic duct is guarded by pyloric sphincter.
Answer : 3rd Option
Explanation :
→ Liver is the largest endocrine gland of the body but not endocrine.
→ The hepatic lobules are the structural & functional unit of liver.
→ Each lobule of liver is covered by a thin connective tissue called the Glisson’s capsule.
→ The common hepato-pancreatic duct is guarded by sphincter of Oddi.
☆ NCERT 11, Page 260 & 261