Oral Biology Test

Cre-Lox recombination is a site-specific recombinase technology, used to carry out deletions, insertions, translocations and inversions at specific sites?

What is the biggest conflict of using mesenchymal stem cells?

What is the hierarchy of embryonic stem cells?

Retroviruses used to deliver the four transcription factors in the earliest studies is safe to generating iPSCs.?

Cytokines are a broad and loose category of long big proteins (~5–20 kDa) that are important in cell signalling.?

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.?

Transcription can be divided into 3 stages: initiation, elongation, and termination, each regulated by a large number of proteins such as transcription factors?

Chromatin immunoprecipitation (ChIP) is a type of immunoprecipitation experimental technique used to investigate the interaction between?

Cells responsible for repair and regeneration consist of?

What are the function of transcription factors?

Growth factors and their receptors can be grouped into ‘superfamilies,’ based upon shared features of ?

Repression, or suppression – decrease the rate of gene transcription?

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.?

Four transcription factors (Oct4, Sox2, Klf4, and c-Myc) sometimes is called Yamanaka’s factors.?

What is the biggest conflict of using induced pluri-potent stem cells?

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). ?

Growth factors and their receptors can be grouped into ‘families,’ based upon shared features of ?

Bacteria responsible for initiation of caries is:

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

Enamel pearls occur in:

Palatal processes of the maxilla are derived from:

Calcified tissues of the tooth are derived from:

If the process of morphogenesis is disturbed:

The epithelial rests in the periodontal ligament are derived from:

Formation of the nose includes:

Odontoblasts start their secretory activity:

All the statement below is true about the classification of taste, except:

Streptococcus mutans is considered to be a principal etiologic agent of caries because it produces acid and it:

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

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

The following embryonic structures contribute to the formation of lower lip:

The number of permanent teeth is:

All of the following are involved in the formation of a tooth except:

The salivary gland is:

All the statement about early dental development, except:

One of the following Which of induces the dental papilla cells to be differentiated into odontoblasts is:

One of the following causes the discolorations of teeth is:

The muscles of mastication are derived from:

The down growth of an epithelial thickening buccal to the dental lamina is known as:

Eruptive phase:

One of the following characterize prenatal development It is:

Each taste bud consists of:

Odontogenesis of the primary dentition begins between:

Another term for the deglutition of food is:

The embryological origin of the hyoid bone is:

One of the following is true about ankylosis:

Chewing sequence could be divided into:

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

Hertwig’s root sheath consists of:

The Hertwing’s epithelial root sheath is composed of:

The little bumps can see on someone’s tongue are:

The tooth germ is composed of:

The 3 stages of Deglutition are:

One of the following is a component of tooth germ:

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

The Hertwig epithelial root sheath of disintegrates:

Passive eruption is:

The function of the inner enamel epithelium is:

The cell rests of Malassez are derivatives of: