11. Which branch of biology is known for the study of tissues on artificial mediums?
[A] Pisciculture
[B] Silviculture
[C] Tissue Culture
[D] Horticulture
Show Answer
Correct Answer: C [Tissue Culture]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium isolated from the parent organism. This technique is also called micropropagation.
12. 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.
13. Which among the following is correct about Karyology?
[A] Study of breasts
[B] Study of pigments
[C] Study of cancer
[D] Study of nucleus
Show Answer
Correct Answer: D [Study of nucleus]
Notes:
The study of the cell nucleus with reference to the number and size of chromosomes is called Karyology.
14. Which of the following is the fastest enzyme?
[A] Pepsin
[B] Carbonic anhydrase
[C] DNA polymerase
[D] DNA gyrase
Show Answer
Correct Answer: B [Carbonic anhydrase]
Notes:
An enzyme is a protein that acts as a catalyst in living organisms, and controls the rate of a chemical reaction inside the body. Carbonic anhydrase is mainly found in RBCs of blood cells, pancreatic cells, etc.
15. A segment of DNA consists of 120 adenine and 120 cytosine bases. What is the total number of nucleotides present in the segment?
[A] 120
[B] 240
[C] 345
[D] 480
Show Answer
Correct Answer: D [480]
Notes:
According to Chargaff’s laws, the amount of adenine is always equal to that of thymine, and the amount of guanine is always equal to that of cytosine, i.e. A = T(120) and G = C (120), hence, the total no. The number of nucleotides would be 120 x 4 = 480.
16. The lysozyme which destroys the bacterial cell, releasing the mature virus is present where?
[A] immediate early phage genes
[B] late genes
[C] delayed early genes
[D] all of these
Show Answer
Correct Answer: B [late genes]
Notes:
The lysozyme which destroys the bacterial cell, releasing the mature virus is present in late genes.
17. What is a motile flagellated asexual cell called?
[A] Sperm
[B] Zoospore
[C] Oospore
[D] Androspore
Show Answer
Correct Answer: B [Zoospore]
Notes:
A zoospore is a motile asexual spore that uses the flagellum for locomotion. These are also called swarm spores.
18. Fruits are not found in gymnosperm plants because__?
[A] They are seedless plants
[B] They are not pollinated
[C] They have no ovary
[D] Process of fertilization does not take place in them
Show Answer
Correct Answer: C [They have no ovary]
Notes:
Fruits are not found in gymnosperm plants because they have no ovaries. Gymnosperms belong to the Kingdom Plantae and the sub-kingdom Embryophyta.
19. Which plant tissue can be classified into sclerenchyma, collenchyma and parenchyma?
[A] Complex Permanent Tissue
[B] Simple Permanent Tissue
[C] Intercalary meristem
[D] Epidermis
Show Answer
Correct Answer: B [Simple Permanent Tissue]
Notes:
Simple Permanent Tissue can be classified into sclerenchyma, collenchyma, and parenchyma.
20. What is the function of the leaf?
[A] Helps in the introduction of florals
[B] Interested in gas-exchange
[C] Both 1 and 2
[D] Involved in seed development
Show Answer
Correct Answer: C [Both 1 and 2]
Notes:
Leaf function helps with flower initiation, is interested in gas exchange, serves as a plant food storage unit, synthesizes food through a process known as photosynthesis, excess water It plays an important role in the removal of small pores called a stomata.
