Biology - Online Test
Q1. The expansion of ICZN is
Answer : Option D
Explaination / Solution:
Animal taxonomists have evolved International Code of Zoological Nomenclature (ICZN). Hence, the correct option is International code of zoological nomenclature.
Q2. The correct organisation of skeletal muscle is
Answer : Option B
Explaination / Solution:
Each organised skeletal muscle in our body is made of a number of muscle bundles or fascicles held together by a common collagenous connective tissue layer called fascia. Each muscle bundle contains a number of muscle fibres. A characteristic feature of the muscle fibre is the presence of a large number of parallelly arranged filaments in the sarcoplasm called myofilaments or myofibrils. The portion of the myofibril between two successive ‘Z’ lines is considered as the functional unit of contraction and is called a sarcomere.
Q3. Bt toxin is obtained from
Answer : Option A
Explaination / Solution:
Bt toxin is obtained from Bacillus thuringiensis bacterium that can kill certain insects like tobacco budworm, armyworm, beetles and flies.
Q4. Which one is not a sexually transmitted disease?
Answer : Option D
Explaination / Solution:
Diseases acquired during sexual intercourse are called sexually transmitted disease. Hepatitis-B is not transmitted through coitus.
Q5. The movement of diffusion is
Answer : Option D
Explaination / Solution:
Movement by diffusionis passive, and may be from one part of the cell tothe other, or from cell to cell, or over short distances, say, from the intercellular spaces of the leaf to the outside.
Q6. Collagen is
Answer : Option C
Explaination / Solution:
In all connective tissues except blood, the cells secrete fibres of structural proteins called collagen or elastin.
Q7. In five kingdom of classification, prokaryotic, non-nucleated and unicellular organisms are included under
Answer : Option B
Explaination / Solution:
The fifth kingdom, Monera, contains all the single-celled organisms that do not possess a true nucleus. Members of the kingdom Monera are commonly referred to as bacteria.
Q8. The hormone secreted by pars intermedia of hypophysis is :
Answer : Option D
Explaination / Solution:
The hormone secreted by pars intemedia of hypophysis is melanocyte-stimulating hormones (MSH). MSH is a peptide hormone also knownas melanotropins.
Q9. Examples of artificial ecosystem is/are:
Answer : Option A
Explaination / Solution:
Artificial ecosystems are man-made ecosystem. Crop field and aquarium are examples of artificial ecosystem as they are man-made.
Q10. Micronutrients are otherwise called as
Answer : Option D
Explaination / Solution:
Micronutrients or trace elements, are needed in very small amounts(less than 10 mole Kg –1 of dry matter). These include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.
