NEET TEST SERIES 153 BIOLOGY

1. Saccharomyces cerevisiae is used to produce enzyme …….

(a) invertase
(b) pectinase
(c) lipase
(d) cellulase

2. Select the wrong statement.

(a) Maximum species diversity is associated with tropical rain forest.
(b) Only biotic factors affect the magnitude of primary productivity.
(c) Energy flow in an ecosystem is always unidirectional.
(d) GFC is major conduit of energy flow in aquatic Eco-system.

3. Vascular bundles in monocotyledons are considered closed because:

(a) Xylem is surrounded all around by phloem.
(b) A bundle sheath surrounds each bundle
(c) Cambium is absent.
(d) There are no vessels with perforations.

4. Identify free living bacterial biofertlizer………

(a) Rhizobium
(b) Azotobacter
(c) Nostoc
(d)Bacillus thuringiensis

5. A template strand of DNA has base sequence CATGATTAC. New strand synthesized on it will be:

(a) GATCAUATG
(b) GТАСТААCG
(c) GAACTAATG
(d) GTACTAATG

6. Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Zoological Nomenclature and correctly described?

a) Musca domestica – The common house lizard, a reptile
b) Plasmodium falciparum – A protozoan pathogen causing the most serious type of malaria.
c) Felis tigris-The Indian tiger, well protected in Gir forests
d) coli – Full name Entamoeba coli a commonly occurring bacterium in human intestine.

7. After childbirth a woman is not able to release milk to feed her child. Which hormone could help in milk ejection?

(a) Prolactin
(b) Pitocin
(c) Estrogen
(d) Progesterone

8. Removal of RNA polymerase III from nucleoplasm will affect the synthesis of:

(a) mRNA
(b) rRNA
(c) tRNA
(d) hnRNA

9. Find the odd one out.

(a) Sea cucumber
(b) Sea urchin
(c) Sea anemone
(d) Sea lily

10. Neoplastic transformation may occur as a result of:

(a) Non-ionizing radiation like X-rays.
(b) Ionizing radiation like UV-rays.
(c) Non-ionizing gamma rays.
(d) Both ionizing and non-ionizing radiations.

11. Which one is not a feature of Adamsia?

(a) Metagenesis
(b) Gastrovascular cavity
(c) Diploblastic
(d) Cnidoblast

12. Uricotelic mode of excreting nitrogenous wastes is found in:

(a) Reptiles and birds
(b) Birds and annelids
(c) Amphibians and reptile
(d) Insects and amphibians

13. Whose experiments cracked DNA and discovered triplet nature of genetic code?

(a) Nirenberg and Mathaei
(b) Beadle and Tatum
(c) Hershey and Chase
(d) Morgan and Sturtevant

14. Which of the following is a non-medicated IUD?

(a) Lippe’s loop
(b) Multiload-375
(c) LNG-20
(d) Progestasert

15. How do parasympathetic neural signals affect the working of the heart?

(a) Reduce both heart rate and cardiac output.
(b) Heart rate is increased without affecting the cardiac output.
(c) Both heart rate and cardiac output increase.
(d) Heart rate decreases but cardiac output

16. Choose the incorrect statement with respect to blood.

(a) Blood is a fluid connective tissue.
(b) It consists of formed elements and plasma.
(c) Blood cells and plasma both are responsible for trans-portation of O₂ and CO₂
(d) Cells of blood form matrix and structural proteins like other connective tissues.

17. The most abundant protein in animals is ___ and most abundant protein on Earth is ____respectively.
Choose the option that fills the blanks correctly.

(a) RuBisCo and Elastin
(b) Collagen and Elastin
(c) RuBisCo and Collagen
(d) Collagen and RuBisCO

18. C-peptide of human insulin is

(a) a part of mature insulin molecule.
(b) responsible for its biological activity.
(c) responsible for formation of disulphide bridges.
(d) removed during maturation of pro-insulin to insulin.

19. Select the Taxon mentioned which represent both marine and fresh water species.

(a) Echinoderms   
(b) Ctenophora
(c) Cephalochordata
(d) Cnidaria

20. The figure shows the schematic plan of blood circulation in humans with labels A, B, C and D. Choose the correct option labelled with its functions.

(a) A – pulmonary vein-takes impure blood from body parts, pO₂ = 60 mm Hg
(b) B – pulmonary artery – takes blood from heart to lungs, pO₂ = 90 mm Hg
(c) C – vena cava – takes blood from body parts to right auricle, pCO₂ = 45 mm Hg
(d) D – dorsal aorta – takes blood from heart to partsm pO₂ = 95 mm Hg