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
2024-01-22
42
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/3384778.html
相关试题推荐
[originaltext]Apoisonousfishwhichhasastingstrongenoughtokillahuman
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(ANWR)tohelp
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(ANWR)tohelp
IsthereenoughoilbeneaththeArcticNationalWildlifeRefuge(ANWR)tohelp
Somefishcanswiminwaterbelow0°C,lowenoughtofreezethebloodofmos
Somefishcanswiminwaterbelow0°C,lowenoughtofreezethebloodofmos
Somefishcanswiminwaterbelow0°C,lowenoughtofreezethebloodofmos
[originaltext] NotenoughAmericanstudentswanttobeengineers,mathematicia
[originaltext] NotenoughAmericanstudentswanttobeengineers,mathematicia
Quittingsmokingishardenoughonitsown,butstudiesshowthechallengei
随机试题
Nextfall,whenyouseegeeseheadingsouthforthewinter,flyingalongin
Youngpeopleareincreasinglybecomingawareoftheneedtochangetheireating
患者女性,36岁,脾破裂行脾切除术后1周,低热,腹腔引流管引流80~180ml淡
浅反射不包括()A.直接角膜反射 B.腹壁反射 C.提睾反射 D.跟
下列关于期权交易基本策略的说法,不正确的有( )。 Ⅰ.买进看涨期权所面临的
8个月婴儿,体重6.5kg,身长70cm,腹部皮下脂肪0.5cm,精神不振,爱哭
关于复利计算过程中的各项系数及相关知识的理解,下列说法正确的有( )。A.等额
根据《自然保护区条例》,进入国家级自然保护区核心区域,必须经()有关自然保
A.短时间暴露于强噪声,使听阈上升10~15dB,脱离噪声接触后数分钟内即可恢复
最新回复
(
0
)