Samples_of_test_questions

Samples_of_test_questions - Samples of test questions 1....

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Samples of test questions 1. What in the cell that cell exerts its special function and expresses its distinct properties? (a) Carbohydrate (b) Fat (c) Protein (d) Phospjolipid (e) Glycolipid 2. Which of following statements is incorrect: (a) Prior 8-cells stage during embryogenesis, cells are loosely attached to each Othern ? should it be up to 16 cells (b) So called compacted morula because their cells undergo compaction by increasing cell-cell adhesion and result in a more solid mass of cells (c) Morula - stage embryo , composed of 64 cells that have separated into two cell Types (d) Trophectoderm (TE) will form extra embryonic tissue like placenta (e) Inner cell mass (ICM) will give rise to the embryo proper 3. At which stage of embryo starts to implant in wall of uterus? (a) 4-cells stage (b) 8-cells stage (c) Morula (d) Mid-blastula (e) Gastrula 4. During gastrulation, epiblast cells migrate to create three germ layers: endoderm, ectoderm and mesoderm. Scanning electron micrograph of a cross section of similar stage of embryo is shown below. The three germ layers indicating A, B, and C. Please pick which of following three germ layers’ name is in right order of A, B, and C: (a) endoderm, ectoderm and mesoderm (b) Endoderm, mesoderm and ectoderm (c) Mesoderm, ectoderm and endoderm (d) Mesoderm, endoderm and ectoderm (e) Ectoderm, mesoderm and endoderm 5. Which of following statements is incorrect: (a) As Zygote cell continues to divide, the potency of its progeny becomes restricted and specialized to form tissues and organs. (b) Cell differentiation is mediated by signals from surrounding environment. Each signal pathways and receptors consists of multiple members that cross-
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
interact with different families of signaling. Cross-interaction of these pathways control different developmental and differentiation fates. (c) Perturbation of signaling pathways often leads to diseases. (d) Blood stem cell is unipotent cell. (e) Zygote cell is a totipoent cell. 6. Embryo at 4-cell stage is: (a) Totipent stem cells (b) Pluripotent stem cells (c) Multipotent stem cells (d) unipotent cells (e) partially differentiated cells 7. A cell that has the capacity to develop into a complete organism is called: (a) Totipent stem cells (b) Pluripotent stem cells (c) Multipotent stem cells (d) unipotent cells (e) partially differentiated cells 8. Which of following statements on adult stem cells is incorrect: (a) Adult stem cells can only differentiate to form the specialized cell types of the tissue in which they reside (b) Adult stem cells can form specialized cell types of other tissues (c) Certain adult stem cells may turn out to be as potency as embryonic stem cells (ES cells ) (d) Hematopoietic stem cells may differentiate into brain cells (e) Trans-differentiation or plasticity is referred to the process of adult stem cells form specialized cell types of other tissues 16 cells(morula) 64 cells(blastula;ICM&trophoblast;mid- blastula,implantation) Gastrula(epiblast
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2011 for the course MD 1002 taught by Professor Qiu during the Spring '10 term at Columbia College.

Page1 / 8

Samples_of_test_questions - Samples of test questions 1....

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online