(i) (ii) (iii) (iv)
(a) Cortisol Steroid Polypeptide Estradiol
(b) Insulin Protein Polypeptide Epinephrine
(c) Cortisol Protein Amine Estradiol
(d) Insulin Steroid Amine Epinephrine
- Select the correct pathway of water movement inside the root.
(a) Epidermis → Endodermis → Cortex → Pericycle → Xylem
(b) Epidermis → Cortex → Endodermis → Pericycle → Xylem
(c) Epidermis → Endodermis → Pericycle → Cortex → Xylem
(d) Epidermis → Cortex → Pericycle → Endodermis → Xylem
- It is a common practice to keep few riped bananas with unriped
bananas so that,
(a) riped bananas can be prevented from rottening
(b) unriped bananas ripe quickly
(c) unriped bananas stay as it is for a longer time
(d) none of these.
- Which of the following contraceptive methods has poor
reversibility?
(a) (b)
(c) (d)
- Read the given statements and select the correct option.
Statement A : Test cross is used to determine an unknown
genotype within one breeding generation.
Statement A : Test cross is a cross between F 1 hybrid and
dominant parent.
(a) Both statements A and B are correct and statement B is the
correct explanation of statement A.
(b) Both statements A and B are correct but statement B is not
the correct explanation of statement A.
(c) Statement A is correct and statement B is incorrect.
(d) Both statements A and B are incorrect.
- The preserved fossil remains of Archaeopteryx show that
(a) it was a flying reptile from the permian period
(b) reptiles gave rise to birds during jurassic period
(c) it was a flying reptile in the triassic period
(d) reptiles gave rise to birds during permian period.
- A disease sometimes found in persons above the age of 40 years
which is characterised by poor CNS coordination, forgetfulness
and tremors of hands is
(a) epilepsy (b) Alzheimer’s disease
(c) migraine (d) schizophrenia.
- Study the following statements regarding inbreeding and select
the incorrect ones.
(i) The inbreeding strategies allow the desirable qualities of
two different breeds to be combined.
(ii) It increases homozygosity.
(iii) It also helps in elimination of less desirable genes.
(iv) Continued inbreeding increases fertility and productivity.
(a) (i) and (ii) (b) (ii) and (iii)
(c) (iii) and (iv) (d) (i) and (iv)
- The purpose of biological treatment of waste water is to
(a) reduce BOD (b) increase BOD
(c) reduce sedimentation (d) increase sedimentation.
- Read the following statements and select the correct ones.
(i) Same kind of sticky ends are produced when a DNA has been
cut by different restriction enzymes.
(ii) Exonucleases make cuts at specific positions within the DNA.
(iii) Hind II was the first restriction endonuclease to be isolated.
(iv) A bacteriophage has the ability to replicate within bacterial
cells by integrating its DNA with bacterial DNA.
(v) Presence of more than one recognition sites within the vector
facilitates the gene cloning.
(a) (i), (iii) and (v) (b) (i) and (iv)
(c) (iii) and (iv) (d) (ii), (iii) and (iv)
- Which of the following is not a benefit of transgenic animals?
(a) Investigation of new treatments for diseases
(b) Early detection of diseases
(c) Testing the safety of vaccines
(d) To produce useful biological products
- Many freshwater organisms cannot live for long in seawater
because the surrounding water will be _ to body cells and __
may occur.
(a) hypertonic, exosmosis (b) hypertonic, endosmosis
(c) hypotonic, exosmosis (d) hypotonic, endosmosis
- Which kind of pyramid is represented by the given figure?
Dry weight (Kg m)–2
PC
PP^4
21
(a) Pyramid of numbers in terrestrial ecosystem
(b) Pyramid of biomass in terrestrial ecosystem
(c) Pyramid of biomass in aquatic ecosystem
(d) Pyramid of numbers in aquatic ecosystem
- ‘Every species has a right to live’. What kind of value implies on
the conservation of biodiversity?
(a) Narrowly utilitarian (b) Broadly utilitarian
(c) Ethical (d) Aesthetic
- The radioactive fallout can cause
(i) near-immediate effect only
(ii) mutation in the DNA of living cells
(iii) long term effect on future generation
(iv) tissue damage and killing of cells only
(a) (i) and (ii) are correct. (b) (ii) and (iii) are correct.
(c) (ii) and (iv) are correct. (d) only (ii) is correct.
- Select the correctly matched pair.
(a) Supermale – XXYY (b) Klinefelter’s syndrome – XO
(c) Superfemale – XXXX (d) Sterile male – XYY
- Highly pleomorphic, smaller microorganisms, forming elementary
bodies are
(a) actinomycetes (b) mycoplasma
(c) diatoms (d) virus.
