olympiad@cscacademy.org

Class-12th (Biology) Olympiad - CANBO

Mock Instructions

  • 1. This is Model Question Paper.
  • 2. This is an Online Worksheet.
  • 3. Total Questions-50.
  • 4. Total Time-60 minutes.

Q.1- The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because:

(a) Offspring do not possess exact copies of parental DNA

(b) DNA of only one parent is copied and passed on to the offspring

(c) Offspring are formed at different times

(d) DNA of parent and offspring are completely different.

Q.2- A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has:

(a) haploid vegetative cells and diploid gametangia

(b) haploid vegetative cells and diploid gametangia

(c) haploid vegetative cells and diploid gametangia

(d) haploid vegetative cells and haploid gametangia.

Q.3- Spot the odd one out from the following structures with reference to the male reproductive system.:

(a) Rete testis

(b) Epididymis

(c) Vasa efferentia

(d) Isthmus

Q.4- Morula is a developmental stage:

(a) Between the zygote and blastocyst

(b) Between the blastocyst and gastrula

(c) After the implantation

(d) Between implantation and parturition

Q.5- All genes located on the same chromosome:

(a) Form different groups depending upon their relative distance

(b) Form one linkage group

(c) Will not from any linkage groups

(d) Form interactive groups that affect the phenotype

Q.6- Distance between the genes and percentage of recombination shows:

(a) a direct relationship

(b) an inverse relationship

(c) a parallel relationship

(d) no relationship

Q.7-  The theory of spontaneous generation stated that:

(a) life arose from living forms only

(b) life can arise from both living and non-living

(c) life can arise from non-living things only.

(d) life arises spontaneously, neither from living nor from the non-living.

Q.8-  Appearance of antibiotic-resistant bacteria is an example of:

(a) adaptive radiation

(b) transduction

(c) pre-existing variation in the population

(d) divergent evolution

Q.9- A group of animals which are related by descent and share many similarities are referred to as:

(a) breed

(b) race

(c) variety

(d) species

Q.10- Sonalika and Kalyan Sona are varieties of:

(a) wheat

(b) rice

(c) millet

(d) tobacco

Q.11 C-peptide of human insulin is:

(a) A part of mature insulin molecule

(b) Responsible for formation of disulphide bridges

(c) Removed during maturation of pro-insulin to insulin

(d) Responsible for its biological activity.

Q.12The site of production of ADA in the body is:

(a) Erythrocytes

(b) Lymphocytes

(c) Blood plasma

(d) Osteocytes

Q.13From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

(a) Monoecious plant bearing unisexual flowers

(b) Dioecious plant bearing only male or female flowers

(c) Monoecious plant with bisexual flowers

(d) Dioecious plant with bisexual flowers

Q.14- Choose the correct statement regarding the ZIFT procedure:

(a) Ova collected from a female donor are transferred to the fallopian tube to facilitate zygote formation.

(b) Zygote is collected from a female donor and transferred to the fallopian tube

(c) Zygote is collected from a female donor and transferred to the uterus

(d) Ova collected from a female donor and transferred to the uterus

Q.15- Diseases are broadly grouped into infectious and non-infectious diseases. In the list given below, identify the infectious diseases.

(i) Cancer

(ii) Influenza

(iii) Allergy

(iv) Small pox

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (iii) and (iv)

(d) (ii) and (iv)