that scientists have been guided by for the last 70 years in the middle of xx century, englishman francis creekican james watson discovered the structure of dna and wrote it as a duplicated helix of links. in this long and complicated molecules are nucleotides that differ from each other in the nitrogenous base adeninguanine and cytosine the formula of dna they are designated by the first letter the nucleotides lined up one after another for what dna chain the second chain in the pair is not identical to the first, but, according to a certain rule, adenine binds to thymine gunyl cytosine, this is the basis of the principle of dna complementarity, the pattern is read by other molecules and triggers the formation of a wide variety of body properties from eye color to intelligence, this mechanism formed the basis our ideas about the transmission of hereditary information. with the help of dna, scientists were sure that the double helix was the master key of the genome, but in the cell soup. a large number of short chains are also brewed. dna a small chain also controls the work of the gene . howev

the san francis creek turned streets into rivers. tonight crews are using electric pumps and muscle power to clear the mud and water. but when brian and his family made it to their two mini vans and two sedans parked in the garage, they were devastated. >> our four vehicles are completely gone. they're totaled. we just checked on them not that long ago. and all the water got into the intakes, the motor, and the brakes got really muddy. >> reporter: now he's left wondering how he and his family will get to work 20 minutes away. >> we're not sure what to do about going to work. most likely, it's a pretty bad situation. >> reporter: at this home, water seeped into the garage, leaving the owner checking for damage. >> it looks like furniture, maybe some drywall. >> reporter: others are navigating mud in homes and on streets. and with more rain ahead, they're bracing for potentially more flooding. and the big concern is, as we get more rain, branch and logs could get jammed up underneath the bridges as the creek levels rise and that could

. >> reporter: this neighbor told us she has sandbags and boards at her mace near the san francis key toe creekd more this week and is filling up extras so they're ready to go for those who may not find it easy to fill up the bags. >> buckets are a lot easier to use when you're by yourself. >> reporter: neighbors say it looks like branches and fallen tree limbs have been pulled from the creek. many are taking precautions but there is still concern as the next round of rain moves in. >> we have to be somewhat concerned. we can't be oh, we're going to be fine. >> reporter: the city posted online saying the risk is low today but people should prepare now for this storm and possible future flood conditions. >> i come out. the water is almost to reach my doorstep. it's like about one foot deep already. so this look like lake. >> reporter: in menlo park, li was still moving mud from his property on new year's eve. soon after, sandbags went up by his garage and he's optimistic. >> we shouldn't have any flood here. we shouldn't. i just want to make sure that's the case. >> reporter: christy smith, nbc

creek. kumasi: the shelter at seven trees is open 24 hours with showers, laundry, and the city says pets are welcome, too. reggie: today the world is saying goodbye to pope benedict. pope francisresided over funeral services this morning and it's the first time a sitting pope has presided over the funeral for his predecessor. vatican says that 15,000 people were there for the mass, including one woman from the bay area. >> it's incredible to see the service, it's been so historical. reggie: he died saturday at the age o. tunnshipers 2013 when he became the first pope to resign in more than 600 years. developing news on capitol hill, kevin mccarthy offering key new concessions after losing a sixth vote for house speaker. including a rule change that will allow just one member to call for a vote to oust a future speaker. even with theio she lead the gavel. the house is scheduled to return this morning at 9:00 our time. until a speaker is chosen, the house cannot pass bills or even swearing new members. coming up at four: 30, bay area students waking up to no school this morning. which are announcing closures? kumasi: blackouts continuing, pg&e working as thousands wake up in the