Free MH-SET Life Science online mock Test 4

1) You are looking at a specimen with a compound microscope. The ocular lens has a magnification of 8X and the objective lens has a magnification of 2X.

What is the total magnification?

2) Which of the following is true for enzyme-catalyzed reactions?

3) Which of the following statements about monosaccharides is correct?
P— Epimers of monosaccharides differ in chemical properties.
Q— In aldoses, C1 is the anomeric carbon.
R— Anomers differ in configuration at the glycosidic carbon.
S— Epimers differ in configuration at any carbon other than glycosidic carbon.

4) If a naive T cell recognizes an antigen-MHC complex on an appropriate antigen-presenting cell or target cell, it will be activated, initiating :

5) Of the following which is not involved in steady-state regulation of hematopoiesis?

6) The evolution of tetrapods marks their origin from :

7) ………………………….. is/are the only nonprotein component/s of the electron transport system.

8) During the evolution of life, the first-formed cells were :

9) In every cycle of its activity, at the expense of one ATP molecule, one Na-K ATPase :

10) During the evolution of life, the first formed photosynthetic organisms were :

11) A phenomenon in which animals adapted to temperate regions have shorter and poorly developed ears, eyes, hair, and other phenotypic traits follow :

12) If one wishes to determine the variation in the body size of frogs from four different populations, the appropriate test statistics would be :

13) Which one of the following is not a characteristic of competitive inhibition of an enzyme?

14) A sampling of a gene pool occurs in sexual reproduction because :

15) State, whether the following two statements (I and II), are true or false :
(I) A reaction is said to be spontaneous when it can proceed in either the forward or reverse direction.
(II) A spontaneous process can occur with a large decrease in entropy.

16) Exo-erythrocytic schizogony in the life cycle of malarial parasite Plasmodium occurs in :

17) Two zoogeographical regions, separated by high mountain ranges are :

18) Members of all the following genera of bacteria are typically found in a maturing Winogradsky column except :

19) Calculate the pI value of aspartic acid from the given pK values.

(Given : pK1 = 1.99, pK2 = 9.90 and pKR = 3.90)

20) This type of enzyme regulation is irreversible in nature :

21) Stringent response in bacteria leads to accumulation of these unusual nucleotides :

22) With the passage of time, the molecular distance between organisms increases during evolution due to :

23) Ernst Myer was a proponent of :

24) How many peptide fragments will be generated by the action of Cyanogen Bromide (CNBr) on the oligopeptide of the following sequence?
Gly—Ala—His—Arg—Asp—Met— Cys—Lys—Val—Leu

25) Alien species experience ……………… when introduced to a new ecosystem.

26) Which of the following enzymes is only involved in the gluconeogenesis pathway?

27) Biome is :

28) The root mean square deviation is commonly known as :

29) Legionella sp. multiplies intracellularly within …………………, just as they do within human monocytes and macrophages.

30) The Redfield ratio is an index of concentration of :

31) Transplantation of stem cell populations from genetically identical donor to recipient is said to be :

32) The procapsid is assembled with the aid of …………………. proteins.

33) Arabidopsis plants have 10 chromosomes (5 pairs) in their somatic cells. How many chromosomes are present in each of the following?
(i) egg cell nucleus in the female
gametophyte
(ii) generative cell nucleus in a
pollen grain
(iii) endosperm nucleus
(iv) fertilized egg nucleus

34) Vegetable seeds purchased from the market germinate when exposed to light with wavelength 660 nm. When followed by brief exposure to 730 nm they fail to germinate and will germinate when given the exposure of 660 nm. So we can conclude :

35) In Gymnosperms the wood is of two types namely :

36) The way, species behave, obtain food and utilize the natural resources of an ecosystem is called :

37) In numerical taxonomy OTUS for analysis of species are :

38) Which of the following plant species has contributed to the ‘A’ genome of Triticum aestivum?

39) Brassica juncea is an amphidiploid
from the interspecific cross of B. nigra
and ………………….

40) Which of the following display insecticidal activity?

41) In commercially available TLC plates the size of a thin layer of absorbent is about :

42) Which of the following DNA sequencing method uses luciferase to generate light for detection of the individual nucleotide added to the nascent DNA, and the combined data are used to generate DNA sequence?

43) Which of the following genotypes are most suitable as parents for hybrid variety development?

44) The active anti-cancer agents vinblastine and vincristine are obtained from :

45) Which process introduces new alleles in a population?

46) Which of the following is not a component of sustainable development policy?

47) . __________ is a very sensitive bioindicator of sulphur dioxide pollution in the air.

48) Which of the following is not an endangered species?

49) First life on earth was:

50) When a population remains on the ascending part of the logistic growth curve, is known as: