24 Questions
Which of the following structures are characteristic of monocotyledonous seeds?
coleoptile and coleorhiza
Which anatomical feature of wood is used to estimate the age of a tree growing in a temperate climate?
Spring wood and late wood
What are the cofactors of the catalytic redox center of Nitrogenase?
Mo and Fe
What is the role of Nitrogenase in biological nitrogen fixation?
Converting N2 to NH4+
What is an example of genetic diversity?
Variation in the potency and concentration of reserpine produced by Rauwolfia vomitoria
Which factor binds to the stop codon during translation?
Release factor
What is the role of asparagine and glutamine in nitrogen fixation?
They are products of nitrogen fixation, transported by phloem
What is the condition required for optimal functioning of Nitrogenase?
Low oxygen levels
What is the requirement for the causative agent of Malaria to generate mature mRNA?
hnRNA splicing
Which pair of inhibitors is most likely to be competitive inhibitors for the enzyme?
P, S
What is the frequency of heterozygous individuals in the island population with respect to the sickle cell anemia allele?
392
What is the purpose of digesting the recombinant plasmid with Not I and EcoR I?
To confirm the presence of the insert
What is the size of the cloned DNA fragment?
1000 base-pair
What is the type of disease that sickle cell anemia is?
Autosomal recessive
What is the purpose of using the Hind III and EcoR I sites in the plasmid vector?
To clone the DNA fragment
What is the expected frequency of the disease allele in the island population?
0.08
What is the primary function of peptones?
Digesting proteins
During karyokinesis, which stage is most affected by a mitotic drug that inhibits microtubule formation?
Metaphase
What is the primary function of the endosperm in seed structure?
Nutrient storage
Which of the following biomolecules is NOT a protein?
Starch
What is the term for the process of bacterial nitrogen fixation?
Assimilation
Which of the following statements is INCORRECT regarding seed structure?
The endosperm is always present in mature dicot seeds
What is the primary function of the aleurone layer in seed structure?
Seed coat formation
During translation, which of the following molecules is NOT directly involved?
Peptone
Study Notes
Physiological Roles
- P is related to (iv)
- Q is related to (v)
- R is related to (i)
- S is related to (ii)
Diseases
- Malaria requires the splicing of their hnRNA to generate mature mRNA
Enzyme Inhibitors
- P and S are the best pair of competitive inhibitors for the enzyme
Sickle Cell Anemia
- Assuming Hardy-Weinberg equilibrium, 392 individuals are expected to be heterozygous for the disease allele in an island with 10,000 individuals
DNA Fragment Cloning
- A 1000 base-pair DNA fragment was cloned between Hind III and EcoR I sites of the plasmid vector (pIAT) of size 3500 base-pair
Tree Age Estimation
- Spring wood and late wood can be used to estimate the age of a tree growing in a temperate climate
Biological Nitrogen Fixation
- The catalytic redox center of Nitrogenase contains Mo and Fe as cofactors
Genetic Diversity
- Variation in the potency and concentration of reserpine produced by Rauwolfia vomitoria is an example of genetic diversity
Translation
- Release factor binds to the stop codon when the ribosome encounters it during translation
Biomolecule Functions
- Match the entries in Column I with their functions described in Column II
Peptones
- Peptones are partially digested proteins
Biomolecule Chemical Nature
- Match the biomolecules given in Column I with their corresponding chemical nature given in Column II
Mitotic Drug
- A mitotic drug inhibits microtubule formation, and metaphase will be the first stage of karyokinesis to get affected by the drug
Seed Structure
- In monocot seeds, the membraneous seed coat that is fused with the fruit wall is not called the aleurone layer
Match the terms with their corresponding physiological roles and answer the question about a disease. Test your knowledge of physiology and biology.
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