Edexcel A level biology topic 3

What is the role of rough endoplasmic reticulum?

• Protein synthesis

• Storages of lipids

• Vesicle production

• Carbohydrate breakdown

Which of the following stages describes chromosomes being pulled apart in a cell?

• Anaphase

• Cytokinesis

• Interphase

• Metaphase

Which of the following is false?

• Human cloning is illegal

• Regulatory authorities will regulate the use of stem cells

• Stem cells are always totipotent

Which is not involved in the acrosomal reaction of the sperm cell?

• Vesicle production

• Exocytosis

• Digestion

• Endocytosis

What is the outer section of an egg cell called?

• Zona pellucida

• Follicle cells

• Nucleolus

• Cytoplasm

What is a pili in bacteria for?

• Movement

• Bacterial conjugation

• to 'hook' onto something to move

What is being described here: alleles being swapped due to tension on parts of non-sister chromatids

• Independent assortment

• Crossing over

• mitosis

• Meiosis

What is the name of the reaction part of histone modification?

• Acetylation

• DNA methylation

Which is involved in controlling gene expression?

• Transcription factors

• RNA polymerase

• The nucleus

What is the term used to describe stem cells that can become most other cells?

• Totipotent

• Multipotent

• Pluripotent