Way 2 Freshers

1. Which of the following is/are form(s) of passive transport?

(A) Facilitated diffusion

(B) Simple diffusion

(C) Both (A) and (B)

(D) None of the above

2. During Hatch-Slack pathway CO 2 is fixed in the

(A) Chloroplast of bundle sheath cells

(B) Mitochondria

(C) Ribosomes

(D) None of the above

3. Chromosomes with median centromere and equal arms are termed

(A) Telocentric

(B) Acentric

(C). Metacentric

(D) Submetacentric

4. Puffs in salivary gland chromosomes represent the site of

(A) RNA synthesis

(B) Protein synthesis

(C) DNA replication

(D) All of the above

5. Lead is mainly considered

(A) Smoke and smog

(B) Air pollutant

(C) Soil pollutant

(D) Water pollutant

6. Which one of the following is a pseudocereal ?

(A) Oryza sativa

(B) Fagropyrum esculentum

(C) Triticum aestivum

(D) Zea mays

7. Some cucurbits are bitter in taste because of tbe presence of-

(A) Tartaric acid

(B) Proteins in lower quantity

(C) Starch in high quantity

(D) Tetracyclic triterpenes

8. The percentage ratio of natality over mortality is called-

(A) Vital index

(B) Biological clock

(C) Senescence

(D) Density-volume

9. Uneven thickening on the wall of collenchyma is found due to the deposition of

(A) Cutin

(B) Chitin

(C) Curcumin

(D) Cellulose and pectin

10. Population with adjacent geographic ranges is called

(A) Allometry (B) Sympatric

(C) Allopatric (D) Parapatric

11. Which of the following essential amino acids is not found in corn meal?

(A) Alanine

(B) Glutamic acid

(C) Glycine

(D) Tryptophan

25. Crossing over is an exchange of genetic material between nonsister chromatids of a bivalent during

(A) Meiosis I

(B) Meiosis II

(C) Mitosis

(D) All of the above

26. Who among the following said that the percentage of A + G equals 50% and the percentage of T + C equals 50% ?

(A) Hershey and Chase

(B) Jacob and Monad

(C) Griffith and Niescher

(D) None of the above

27. Biologists who study the sequence of organisms in the fossil record are

(A) Systematists

(B) Taxonomists

(C) Paleobiologists

(D) None of the above

28, The cretaceous period, during which flowering plants appeared,occurred approximately

(A) 280 million years ago

(B) 135 million years ago

(C) 1,35 billion years ago

(D) 80 milliol1 years ago

29. Bacteria that must have organic molecules both for energy and as a source of carbon are called

(A) Chemoautotrophs

(B) Photohetrotrophs

(C) Photoautotrophs

(D) Chemoheterotrophs

30. In allopatric speciation, the initial barrier to gene flow is

(A) Ecological

(B) Postzygotic

(C) Geographic

(D) None of the above

31. Saffron is obtained from

(A) Dried stigma of Crocus plant

(B) Dried flower of Papaver somniferum

(C) Dried flower of rose

(D) None of the above

32. The correct statement(s) for photosynthesis is/are

(A) It provides food either directly or indirectly for most living things

(B) It produces oxygen

(C) It provides energy to create today’s fossil fuels

(D) All of the above are correct

33. Cladode is found in

(A) Asparagus

(B) Opuntia

(C) Both (A) and (B)

(D) Hydrilla

34. Which of the following plants yielc!s the drug ‘ephedrine’ ?

(A) I Saraca indica

(B) Terminalia arjuna

(C) Adhatoda vasica

(D) None of the above