首页
登录
职称英语
Some fish can swim in water below 0°C, low enough to freeze the blood of mos
Some fish can swim in water below 0°C, low enough to freeze the blood of mos
游客
2023-07-05
14
管理
问题
Some fish can swim in water below 0°C, low enough to freeze the blood of most creatures. However, some fish and insects can stay alive in the freezing water. One key to survival is a special protein in the fish’ s blood. The chemical is called the Antifreeze Protein, otherwise known as AFP and is commonly found in fish that live in cold waters.
What does AFP do in these fish? First, we need to understand what happens when water freezes. When the temperature of the water drops below -1.0°C, tiny particles of ice start forming in the water. Each particle becomes larger and then sticks to other particles, forming blocks of ice. Fish take in this water and tiny particles of ice also form inside a fish’s body. However, the AFP in the blood of the fish surrounds these particles, preventing them from sticking together to form bigger pieces of ice.
The application of AFP is promising. For example, AFP can be used to alter the taste and texture of ice-cream. It can also be used to store meat and vegetables more effectively by protecting food products from the formation of ice. Another application is in medical field, as AFP can help preserve organs for transplantation without freezing them. Scientists have known about AFP for more than 30 years, yet few of the technologies that use the AFP exist today. The process of getting the necessary amount of AFP from fish to make products was only recently discovered. Some companies in the United States and Canada have already made products using AFP, but they have yet to become popular. Although some researchers in Japan discovered that some local fish contained AFP and succeeded in creating AFP in the laboratory, more research is necessary. AFP tests will continue for these fish out of the water. [br] The Antifreeze Protein______.
选项
A、is a kind of protein that many fish have stored in their bodies
B、is found in certain fish that live in extremely cold water
C、increases the freezing process of water in the ocean
D、is the key to finding the location offish in cold regions
答案
B
解析
细节题。文章第一段最后一句指出known as AFP and is commonly found infish that live in cold waters,由此可知答案为B。
转载请注明原文地址:https://tihaiku.com/zcyy/2809878.html
相关试题推荐
Somefishcanswiminwaterbelow0°C,lowenoughtofreezethebloodofmos
Somefishcanswiminwaterbelow0°C,lowenoughtofreezethebloodofmos
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforre
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(ANWR)tohelp
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(ANWR)tohelp
随机试题
Americancitiesare【C1】______otherdriesaroundtheworld.Ineverycount
Now,youngpeoplearegrabbingtheirpassportsandtravelaroundtheworldo
[originaltext]ThesilenceoftheReferenceLibrarywasbrokenonlybyanoc
[originaltext]M:Mysister’sbirthdayisonthe9th.We’regoingtohavedinner
关于工程计量时每一项目汇总工程量的有效位数应遵守的规定,下列说法正确的有( )
下列说法不正确的是A.恒牙釉质密度大于乳牙 B.老年恒牙的硬度要大于年轻恒牙
复方制剂中的多数药材均采用的粉碎方法是A水飞法 B单独粉碎 C超细粉碎 D
A.医学科研是有意识、有目的的,是对研究对象能动的反映B.医学科学与医学道德相互
2,2,2,,,( )
共用题干 一般资料:孙某,男性,20岁,大学二年级学生。案例介绍:春节后开学,
最新回复
(
0
)