How many kinetochores are there in a human cell at mitosis. Introduction: Mitosis is the process of somatic cell division in which two identical daughter cells are produced. Each daughter cell produced has equal chromosome numbers as parent cell. Kinetochores are large proteins which are located at the centromere of each sister chromatid. Kinetochore microtubules attach to sister-chromatids pair at kinetochores.

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In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count# 1 1 4 1 12 2 16 20 4 7 What day should you recommend expiring the yogurt (the last possible date before the microbial load is unsafe). 12 4 20 16

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Question

Chapter 17, Problem 11P

Summary Introduction

To determine: How many kinetochores are there in a human cell at mitosis.

Introduction: Mitosis is the process of somatic cell division in which two identical daughter cells are produced. Each daughter cell produced has equal chromosome numbers as parent cell. Kinetochores are large proteins which are located at the centromere of each sister chromatid. Kinetochore microtubules attach to sister-chromatids pair at kinetochores.

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In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count# 1 1 4 1 12 2 16 20 4 7 What day should you recommend expiring the yogurt (the last possible date before the microbial load is unsafe). 12 4 20 16

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