Oral Biology Test

6 votes, 4.3 avg

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Oral Biology Test


1 / 60

Embryonic stem cells were banned for basic research practice because it is an unethical practice. Moreover, it cannot create patient-match specific cell line.?

2 / 60

Mesenchymal stem cells is derived from bone marrow. So they can differentiate into hematopoietic cell line.?

3 / 60

The process by which information from a gene is used in the synthesis of a functional gene product such as a protein?

4 / 60

Non-marrow origin mesenchymal stem cells EXCLUDE ?

5 / 60

Why embryonic stem cells were banned for basic research?

6 / 60

Activation, or promotion – increase the rate of gene transcription?

7 / 60

Upon introduction of reprogramming factors, cells begin to form colonies that resemble pluripotent stem cells, which can be isolated based on their:?

8 / 60

Mesenchymal stem cells can be extract from many types of tissue, but the most commence one is bone marrow.?

9 / 60

A protein that works with transcription factors to decrease the rate of gene transcription?

10 / 60

The first differentiation event in humans occurs at approximately —— days of development, when an outer layer of cells committed to becoming part of the placenta (the trophectoderm) separates from the inner cell mass (ICM). ?

11 / 60

A protein that works with transcription factors to increase the rate of gene transcription?

12 / 60

Some important human diseases are caused by the death or dysfunction of one or a few cell types, e.g., insulin-producing cells in diabetes or dopaminergic neurons in Parkinson’s disease. Therefore, understanding and using stem cells as tool to study this disease model provide a better understand this dysfunction of cell types.?

13 / 60

Yamanaka’s factors were chosen because they were known to be involved in the maintenance of pluripotency, which is the capability to generate all other cell types of the body.?

14 / 60

Why generation of iPSc is so attractive to scientist worldwide?

15 / 60

A protein that binds to DNA and regulates gene expression by promoting or suppressing transcription?

16 / 60

All four factors are absolutely necessary. In particular, the gene c-Myc is known to promote tumor growth in some cases, which would not affect iPSC usefulness in transplantation therapies. ?

17 / 60

Growth factor responsible for repair and regeneration: VEGF, Vascular endothelial growth factor?

18 / 60

Growth factor responsible for repair and regeneration: PDGF, Platelet derived growth factor?

19 / 60

What is the biggest conflict of using mesenchymal stem cells?

20 / 60

The muscles are derived from the first brachial arch:

21 / 60

One of muscles of mastication arise from the zygomatic arch and inserts on ramus of the mandible is:

22 / 60

All the statement about early dental development, except:

23 / 60

Calcified tissues of the tooth are derived from:

24 / 60

The development of secondary palate begins from:

25 / 60

The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a:

26 / 60

Concrescence is:

27 / 60

In a developing tooth, if Hertwig’s sheath and the epithelial diaphragm were failed to form, the resulting tooth would exhibit:

28 / 60

During tooth eruption into the oral cavity, what happens to the epithelial covering of the enamel:

29 / 60

Tongue begins to develop at:

30 / 60

One of the following is associated with an erupted tooth:

31 / 60

All of the following does occur during the eruptive phase, except:

32 / 60

All of the following statements about the eruption of a permanent tooth and the exfoliation of its predecessor are true, except:

33 / 60

The embryo’s stomodeum is lined by:

34 / 60

Pure mucous salivary gland is:

35 / 60

The epithelial component of the tooth germ is known as:

36 / 60

Each taste bud consists of:

37 / 60

If the process of morphogenesis is disturbed:

38 / 60

Initiation of caries by Streptococcus mutans is by the production of the:

39 / 60

Four basic qualities:

40 / 60

The following is component of the enamel organ except:

41 / 60

The dental sac gives rise to:

42 / 60

Widely accepted theory of dental caries is:

43 / 60

All of the following is a functional activity of the enamel organ, except:

44 / 60

One group of structures is entirely derived from the dental sac:

45 / 60

An oblique facial cleft is the result of:

46 / 60

Chewing sequence could be divided into:

47 / 60

The dietary carbohydrate most likely involved in etiology of dental caries is:

48 / 60

The number of roots that are formed is determined by the:

49 / 60

The stratum intermedium:

50 / 60

Primordium for the permanent dentition appears as an extension of dental lamina into the ectomesenchym at:

51 / 60

First stage of deglutition is:

52 / 60

The secretions of salivary glands are:

53 / 60

The inferior parathyroid gland originates from:

54 / 60

Oral foci of Miller’s are seen in:

55 / 60

Function of gingival cervicular fluid is:

56 / 60

The three major salivary glands are:

57 / 60

The taste sensations appear to be located from the parts of:

58 / 60

Histological changes occurring during the eruptive phase:

59 / 60

Concerning cleft lips and cleft palates:

60 / 60

The last hard dental tissue to be deposited is:

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