Biology Study guides, Class notes & Summaries

BIOD 171 module 6 (2 Versions) . True or False: Because the genome is contained within an enclosed space, (much like the nucleus of a cell) viruses are classified as eukaryotic: False. Viruses are neither eukaryotic nor prokaryotic 2. Describe the two basic components of a virus (short answer): A virus has 1. genomic material comprised of either DNA or RNA and 2. a capsid, a membrane-like protective structure that contains the genetic material, similar to the nucleus of a eukaryotic cell...

Apoptosis is the programmed cell death of damaged or unwanted cells. (a) Fig. 1.1 shows a transmission electron micrograph (TEM) of apoptosis of a leucocyte. Fig. 1.1 A B C (i) Name the following structures and processes shown in Fig. 1.1: • the structure labelled A forming in the cell surface membrane • the process occurring to the organelle labelled B • the structure labelled C. Structure A ...........................................................................................

2 OCR 2023 1 This question is based on the Advance Notice Article ‘Development of therapeutic antibodies for the treatment of disease’. (a) (i) State what is meant by the term antigen. ........................................................................................................................................... . ..................................................................................................................................[1] (ii) Scientists can combine...

2 OCR 2023 Section A You should spend a maximum of 40 minutes on this section. Write your answer for each question in the box provided. 1 The image shows an erythrocyte after being placed in a solution. Which option explains the appearance of the erythrocyte? A The solution was distilled water. B The water potential of the solution is equal to the water potential of the cytoplasm of the erythrocyte. C The water potential of the solution was less negative than the cytoplasm of the eryth...

1 Cats are mammals. (a) A light micrograph of a section through the trachea of a cat is shown in Fig. 1.1. Fig. 1.1 A B C (i) Name the tissues labelled A and B in Fig. 1.1. A ........................................................................................................................................ B ........................................................................................................................................ [2] (ii) Name the two types of cell in ...

Prokaryotes do not have a ________. However, they do have ________. Correct Answer-nucleus, DNA. What two things store energy in cells? Correct Answer-ion gradient and covalent bonds. True or False: both prokaryotes and eukaryotes have ribosomes and plasma membranes. Correct Answer-True What are the big 6 atoms? Correct Answer-Carbon, Hydrogen, Oxygen, Phosphorus, Sulfur, Nitrogen What is assimilation? Correct Answer-making the big 4 macromolecules (proteins, carbs, nucleic acids, li...

What are the general characteristics of all animals? Correct Answer-Getting food, digestion, cellular respiration, respiratory exchange, assimilation, secretion, elimination, reproduction, asexual growth/movement What is the difference between anatomy and physiology in terms of the scope of topics each area of study covers? Correct Answer-anatomy - reflects history, structure physiology - function What are the levels of organization in an animal from smallest to largest level? Correct Ans...

2 OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which option correctly describes a tissue? A A group of cells performing similar functions B A group of organs performing a specific function C A group of similar cells performing a specific function D A group of similar cells performing a variety of functions Your answer [1] 2 Bone marrow stem cells are a source of erythrocytes. Which statement abo...

Other than energy, what does food contain that is vital for life? Correct Answer-nutrients malnutrition Correct Answer-lack of essential nutrients in diet leading cause of death for children worldwide Correct Answer-malnutrition (answer) Where/why is malnutrition prevalent? Correct Answer-Sub-Saharan Africa; hot/dry, growing season is short essential nutrients Correct Answer-obtained in food (amino acids, fats, vitamins, minerals) because the body can't make them purpose of essen...