CLASS XII
BIOLOGY REVISION TEST (TERM I)(Objective)
(01.12.2021) Answer are bold
1. The example of budding is
- a. Amoeba
- b. Hydra
- c. Planaria
- d. Euglena
2. Haploid gametes on their fusion produce
- a. Seed
- b. Fruit
- c. Zygote
- d. Embryo
3. Organisms that lay eggs are called
- a. Oviparous
- b. Viviparous
- c. Ovoviviparous
- d. None of these
4. In Bryophyllum, vegetative reproduction occurs by means of
- a. Stem
- b. Root
- c . Leaves
- d. All of the above
5. Pollination by the agency of water is called
- a. Entomophily
- b. Zoophily
- c. Hydrophily
- d. Anemophily
6. Receptive part of the carpel is
- a. Stigma
- b. Nucellus
- c. Exine
- d. Style
7. The function of tapetum is
- a. Supportive
- b. Nutritive
- c. Mechanical
- d. Protective
8. Flowers with both androecium and gynoecium are called as
- a. Pistillate
- b. Unisexual
- c. Bisexual
- d. Staminate
9. Sertoli cells secrete the hormone
- a. Relaxin
- b. Testosterone
- c. Inhibin
- d. Gonadotrophin
10. Ovulation in human females is controlled by
- a. LH
- b. Oxytocin
- c. Gonadotropin
- d. All of the above
11. Implantation is the attachment of blastocyst to
- a. Ovarian wall
- b. Uterine wall
- c. Fallopian tube
- d. Ampulla
12. Hormones for the menstrual cycle are produced by
- a. Ovary
- b. Uterus
- c. Ovary and pituitary
- d. Fallopian tube
13. AIDS is the ----disease
- a. Fungal
- b viral
- c. Bacterial
- d. Protozoan
14. Maximum growth rate occurs in
- a. Lag phase
- b. Exponential phase
- c. Stationary phase
- d. Senescent phase
15. Expand the ART
- a. Artificial reproductive technology
- b. Assisted reproductive technology
- c. Artificial reproductive technique
- d. Assisted reproductive technique
16. What is related to males
- a. Tubectomy
- b. Oral pills
- c. CuT
- d. Vasectomy
17. Ratio 9:3:3:1 is obtained in a cross due to
- a. Segregation of genes
- b. Crossing over
- c. Linkage
- d. Independent assortment of alleles
18. The cause of Down's syndrome is
- a. Trisomy of X chromosome
- b. Trisomy of 21st chromosome
- c. Monosomy of 21st chromosome
- d. Nullisomy of 21st chromosome
19. The sex of human child is determined by
- a. Size of egg
- b. Size of sperm
- c. sex chromosome of father
- d. Sex chromosome of mother
20. A gene showing codominance has
- a. One allele is dominant over the other
- b. Allele tightly linked to chromosome
- c. Alleles can express them independently
- d. Alleles that shows crossing over
21. Uracil is present in RNA at the place of
- a. Thymine
- b. Adenine
- c. Guanine
- d. Cytosine
22. Which of the following is referred to as soluble RNA
- a. rRNA
- b. tRNA
- c. mRNA
- d. dsRNA
23. The process of transcription involves
- a. Synthesis of DNA
- b. Synthesis of RNA
- c. Synthesis of proteins
- d . Expression of genes
24. Nucleosomes are composed of
- a. RNA and proteins
- b. DNA and RNA
- c. DNA and non histone proteins
- d. DNA and histone proteins
25. A bacteriophage is
- a. Bacterium that attacks another bacterium
- b. Virus that attacks humans
- c. Virus that attacks bacteria
- d. Bacterium that attacks virus
26. Analogous organs arise due to
- a. Artificial selection
- b. Genetic drift
- c. Divergent evolution
- d. Convergent evolution
27. Factors affecting Hardy Weinberg equilibrium are
- a. gene flow
- b. Genetic drift
- c. Mutation
- d. All of the above
28. Lichens are used as an indicator for
- a. Air pollution
- b. Soil pollution
- c. Water pollution
- d. Minerals
29. Sum total of all allelic frequencies is
- a. 0.1
- b. 1
- c. 1.5
- d. 0
30. Which gas was absent in the prebiotic environment
- a. Methane
- b. Ammonia
- c. Oxygen
- d. None of these
31. Ascaris lumbricoides is an endoparasite that lives in
- a. Humans
- b. Sheep
- c. Grasshopper
- d. All of the above
32. The immunoglobulin abundant in colostrum is
- a. IgA
- b. IgB
- c. IgD
- d. IgE
33. The organ which is most affected by alcohol is
- a. Heart
- b. Liver
- c. Cerebellum
- d. Cerebrum
34. Sarcoma is the cancer of
- a. Epithelial tissue
- b. Blood
- c. Mesodermal tissue
- d. Endodermal tissue
35. An antibody is
- a. A carbohydrate found in blood
- b. A secretion of an RBC
- c. WBC that attacks bacteria
- d. Molecule that specifically reacts an antigen
